Pradeep Kumar - Department of Physics at the University of Florida

Professional Data on Pradeep Kumar

Work: Home: PO Box 118440 Department of Physics 2390 NW 18th Place University of Florida Gainesville, FL 32605 Gainesville, FL 32611 Phone: (352) 392 6690 (352) 379 8781 FAX: (352) 846 0295 Email: pkumar@ufl.edu

Personal: Born January 1, 1949, Allahabad India

Naturalized US Citizen
Marital Status: married to Diana Tonnessen

Children:
Casey Alok Kumar
Vijay Alexander Kumar
Ravi Armand Kumar

Education: University of California at San Diego, Ph.D. (Physics) 1973 Title: "Fluctuation and Catalysis" Advisor: Professor H. Suhl, Department of Physics.

Indian Institute of Technology, Kanpur, India M.Sc. (Physics) 1968

Lucknow University, Lucknow, India B. Sc. (Physics, Statistics and Math.) 1966

Professional Record:

Emeritus Professor, UF Department of Physics, 2015-
Professor, Department of Physics, University of Florida, Gainesville, FL 32611, 1993-2015

Program Director, National Science Foundation, Division of Materials
Research, Materials Theory Program, 1995-97, 1999-00

Editor in Chief, "Superconductivity Review" A quarterly,
review journal published by Gordon and Breach Science Publishers,
1992-97

Associate Professor, Department of Physics, University
of Florida, Gainesville, FL 32611, 1983-93.

Assistant Professor, Department of Physics, University
of Florida, Gainesville, FL 32611, 1979-83

Assistant Professor in the Department of Physics,
University of Southern California, Los Angeles, CA 90007, 1977-1978

Research Associate, Department of Physics, University
of Southern California, Los Angeles, CA 90007, 1975-1977

Postdoctoral Fellow, Laboratory for Surface Studies,
University of Wisconsin, Milwaukee, Wisconsin 53201, 1973-1975

Research Assistant, Physics Department, University
of California San Diego, La Jolla, CA 92037, 1970-1973.

Visiting Appointments:

Summer Visitor, Los Alamos National Laboratory, Center for Nonlinear Studies
and Condensed Matter Group, Theory Division; 1998, 1999, 2005, 2011, 2015

Visiting Professor, Laboratoire de Physique des
Solides, Universite Paris-Sud, Orsay, France, June 1994.

Visiting Professor, University of Bayreuth, Bayreuth,
Germany, June 1992.

Visiting Scientist, Service de Physique des Solides
et de Resonance Magnetique, Commissariat de l'Energie
Atomique, Saclay, France, May--August 1989.

Visiting Senior Scientist, Helsinki University
of Technology, Finland, November- December 1987

Visiting Professor, Laboratoire de Physique des
Solides, Universite Paris-Sud, Orsay, France, September 1987

Visiting Scientist, Oakridge National Laboratory,
Solid State Division, Oakridge, TN, June-August 1985

Collaborator, Center for Nonlinear Studies, Los
Alamos National Laboratory, Los Alamos, NM 1981 - 89

Visiting Senior Scientist, Low Temperature Laboratory,
Helsinki University of Technology, Otaniemi, Finland, March - July 1984

Visiting Professor, Groupe de Physique des Solides,
Ecole Normale Superieure, Paris, France, June 1982

NORDITA guest professor at the Helsinki University
of Technology, Otaniemi, Finland, 1978-1979

Recent University Service:

Member, UF Board of Trustees, 2014-15.

Chair, UF Faculty Senate 2014-15.

College of Liberal Arts and Sciences Sabbatical Committee (2004, 2006)

Univeristy Minority Mentor Program (2003-2006)

Faculty Senate, Senator (2003-2006), (2006- )

Member and Chair (2003-2004) Senate Committee for
Academic Freedom, tenure and Professions Standards (2003-2006)

Member at Large, Faculty Senate Steering Committee. (2004-2007, 2010-2013)

Member, Faculty Senate Committee for Honorary Degrees, Distinguished
Alumnus Awards and Memorials (2006-2009)

Member, Joint Committee for Transportation and Parking (2006-2009)

Member, J. Wayne Reitz Union Board of Managers (2006-2009)

Community Service:

Program Officer, Division of Materials Research,
National Science Foundation. 1995-97, 1999-2000.

Editor in Chief, "Superconductivity Review" A quarterly,
review journal published by Gordon and Breach Science Publishers, 1992-97 .

Co-Chair, "International Conference on Strongly
Correlated Electron Systems-93", San Diego, CA, August 16--19, 1993.

Organized, with J. R. Schrieffer, a joint meeting
of the condensed matter groups of the University of Florida and Florida State
University. These one day meetings were held twice a year at Steinhatchee,
a fishing village on Florida's gulf coast roughly half way between Gainesville
and Tallahassee.

Co-Chair, "Conference on Physical Phenomena at
High Magnetic Fields", Tallahassee, FL, May 15--18, 1991.

Participated in various activities related to the
formation of the National High Magnetic Field Laboratory in Florida. These
included participation in the writing of the original proposal, attendance
at various site visits and a long term (since inception) member of the UF committee
on NHMFL.

Member of the Organizing Committee, "Symposium
on Quantum Fluids and Solids-89", Gainesville, FL, April 24--28, 1989.

Member of the International Program Advisory Committee, "Banff
Conference on Quantum Fluids and Solids", Banff, Alberta, Canada,
October 13--17, 1986.

Member of the Organizing Committee, "Sixth Annual
Conference on Nonlinearity in Condensed Matter", Center for Nonlinear Studies,
Los Alamos National Laboratory, Los Alamos, NM, May 5--9, 1986.

Member of the Organizing Committee, "Symposium
on Quantum Fluids and Solids", Sanibel Island, FL. April 11--15, 1983.

Coordinator, "Frontiers of Science", a public lecture
series at the University of Florida, 1980--83, 1988

In addition I have served as a reviewer for papers
submitted to scientific journals, proposals submitted to funding agencies both
in US and also abroad, chaired the sessions at conferences, given summary talks
for conferences and served as a judge in the local as well as International
Science and Engineering Fair, a competition for young high school scientists.

Membership in Professional Societies:

American Physical Society

American Association for the Advancement of Science

Mentioned in American Men and Women of Science,
Who's Who in Frontiers of Science

Research Support:

Research Corporation

National Science Foundation

US Department of Energy

DARPA

NATO

Research Interests:

More than 100 refereed papers in the theory of Condensed Matter Physics, with special
focus on Magnetism, Superconductivity and Superfluidity. The current interests include:
(the numbers refer to the papers in the list of publications below):

Current Research:

Higher Order Phase Transitions My recent work concerns the possibility of a higher order phase transitions. Before Ehrenfest's discussion of a second order phase transition, which in turn was stimulated by the experimental results of the specific heat at the superfluid transition in Helium, a phase transition was what we would now call a first order or a discontinuous transition. There is a need for a collection of expected properties if the transtion is
of a higher order. In 1999, Donavan Hall, Roy Goodrich (both then at the LSU) and I
proposed(92) that the anomalies seen in the superconducting transtion in doped BaBiO3
were characteristic of a fourth order phase transition. In later papers, we have gathered
a collection of results which are the experimental signatures of a higher order phase
trasition (97,102,104). For example, the London penetration length (or the superfluid
density) near T_c, has a temperature dependence a^(p-1) where a is the reduced
temperature {a = (1-T/Tc)} and p is the order of the transtion. These need to be verified.

Novel Materials I also serve as the sounding board for ideas for a number of my experimentalist colleagues. Sometimes these discussions are extensive and lead to publications(67, 74, 89, 91,93,99-101,103, 105). Currently G. Stewart has been exploring the properties of CePt3Si, a superconductor with a lattice without inversion symmetry. B. Andraka has been exploring the superconducting properties of doped, filled skutterdites, in particular PrOs4Sb12. These are compounds where the anomalously large specific heat (a characteristic of heavy fermions) perhaps arises from non-magnetic quadrupolar fluctuations. Much of this work rests on experiments conducted at high magnetic fields and are influenced by a subtle interplay betwee the magnetic response as well as the quadrupolar response. Another aspect of this subject which brings forth rich physics is the coexistence and competition among the multiple ground states (94, 96).

Multiple Ground States
I have been keeping current with the research on two subjects of strong interest:
(a) Dilute magnetic semiconductors are 3-5 or 2-6 compounds which have been doped
by magetic ions such as Mn or Cr. The magnetic ions interact with each other via the carriers.
These systems are different from a conventional magnetic impurity system in several ways:
(1) The carrier concentration is smaller than that of the magnetic ions.
(2) An important role is played by the disorder inherent in the random distribution of the
magnetic ions.

(b) There is some interest in the study of multifunctional materials, for example
materials that are both a ferroelectric and a ferromagnet. These materials may allow
control of magnetization by electric field or alternatively control of electric polarization
by a magnetic field. There are subtle requirements on the response functions since
a magnetic field breaks the time reversal invariance but is invariant under inversion
symmetry, opposite of what an electric field is by symmetry.

Some results from the past work:

1. My doctoral work, under the supervision of Professor
H. Suhl was on the effect of thermal fluctuations in a solid on its catalytic
properties. (1,2,5,6, 9).

2. During the thesis work, I needed to understand
the properties of thermal fluctuations at a surface. This work, involving calculation
of magnetic susceptibility near a surface for both itinerant and localized
magnetic moments, continued later. (3,4,7,8,13, 25,28 )

3. Electromigration work, done in collaboration
with R. Sorbello derived a formuula for the current induced electromigration
force on the atoms in a solid using many body theory. (11)

4. Professor K. Maki introduced me to solitons
and to superfluid 3He. In solitons, we published a detailed solution
of the initial value problem for sine-Gordon equation using the inverse scattering
transform (15) and properties of a quasi-soliton in a double sine-Gordon equation
(27,33). This latter work was also done with two, then undergraduate
students.

5. In superfluid 3He, The superfluid order parameter
(in the A phase) consists of two vectors, one in the real space and the other
in the spin space. The vectors are subject to constraints by the physical
conditions, for example an external magnetic field, a supercurrent or a surface. With
an arbitrary geometry, one is likely to encounter defects and textures. One
special kind of textures where the spin space vector and the angular momentum
udnergo a realtive rotation of pi, have a characteristic signature in the NMR
spectrum, in the form of satellites. In the A phase, we were able to
identify the most favorable texture as well as the frequencies of its NMR satellites. In
the B phase too we were able to give a comprehensive description of the relative
energies of all wall like textures (14,17-24,26).

6. Prof. O. V. Lounasmaa introduced me to
the subject of nuclear magnetism. There were two principal directions
in this research. The first involved extraction of the interaction parameters
between nuclear magnetic moments of Copper using clever NMR experiments. In
the second direction we developed a version of the well known Spherical model
to calculate the entropy of nuclear spins in the paramagnetic phase.
(29-31, 45,46, 48, 50, 76,78)

7. The thermodynamic properties of a magnetic chain
can be described in terms of particle-like excitations, the solitons, and wave-like
excitations, the spin waves. I discovered an instability in the mathematical
description of solitons (also discovered by Magyari and Thomas). This led to
a body of work, partly analytical (35,36,38-40, 51) and partly numerical (37,
44) where the consequences of this instability were examined.

8. I have been interested in the issues associated
with multiple ground states in a superconductor. The body of work here
includes simple thermodynamic analysis of a phase diagram (61, 89, 91), tunnelling
involving multi-component ground states, and derivation of a phase diagram
(55).

Publications:

1. "Role of Spin Fluctuations in the Desorption of Hydrogen from Paramagnetic Metals",
H. Suhl, J. H. Smith and P. Kumar, Phys. Rev. Lett. 25, 1442 (1970).

2. "A Pseudopotential for the Calculation of Transition Rates of Atoms Chemisorbed on Metals",
P. Kumar and H. Suhl, Phys. Rev. B5, 4664 (1972).

3. "Fluctuation Enhancement of Magnetic Moment near a Metallic Surface",
M. T. Beal-Monod, P. Kumar and H. Suhl, Sol. St. Comm. 11, 855 (1972).

4. "Surface Paramagnons in Nearly Ferromagnetic Metals", M. T. Beal-Monod,
P. Kumar, D. L. Mills, H. Suhl and R. A. Weiner, Proc. XIII International Conference
on Low Temperature Physics, Ed. Timmerhaus, O'Sullivan and Hammel, Plenum Press
New York, V. 4, p. 29 (1974)

5. "Reaction Kinetics at Solid Surfaces", E. G. d'Agliano, W. Schaich, P. Kumar and
H. Suhl, Proc. Nobel Symposium XXIV, Ed. S. Lundquist and B. Lundquist,
Academic Press, New York, p. 200 (1974).

6. "Fluctuation and Catalysis", Thesis, University of California, San Diego (1973).

7. "Magnetization Near the Surface: Heisenberg Model", P. Kumar, Phys. Lett. 47A, 187 (1974).

8. "Magnetic Phase Transition at a Surface: Mean Field Theory", P. Kumar,
Phys. Rev. B10, 2928 (1974).

9. "Brownian Motion Model of Surface Chemical Reactions: Bootstrap Derivation and
Parameter Evaluation", E. G. d'Agliano, P. Kumar, W. Schaich and H. Suhl, Phys.
Rev. B11, 2122 (1975).

10. "A Simple Dispersion Relation for the Surface Plasmon: Dependence on Electron Density
Profile", B. B. Dasgupta, P. Kumar and D. E. Beck, Surface Science 48, 241 (1975).

11. "Linear Response Theory of the Driving Forces for Electromigration", P. Kumar and R. S.
Sorbello, Thin Solid Films, 25, 25 (1975).

12. "Plasma Oscillations of a Charged Layer at an Insulator Surface", D. E. Beck and
P. Kumar, Phys. Rev. B13, 2859 (1976). See the erratum Phys. Rev. B14, 5127 (1976).

13. "Surface Spin Fluctuations in the Paramagnetic Phase", P. Kumar and K.
Maki, Phys. Rev. B13, 2011 (1976).

14. "Magnetic Solitons in Superfluid 3He", K. Maki and P. Kumar, Phys. Rev.
B14, 118 (1976).

15. "Creation of Magnetic Solitons in Superfluid 3He", K. Maki and P. Kumar,
Phys. Rev. B14, 3920 (1976).

16. "Point-Like Objects ("Monopoles" or "Hedgehogs") in superfluid 3He-A", C. R. Hu,
P. Kumar and K. Maki, Preprint (1976). Often cited but never published.

17. "Composite Magnetic Solitons in Superfluid 3He-A", K. Maki and P. Kumar,
Phys. Rev. Lett. 38, 557 (1977).

18. "Stability of Planar Textures in Superfluid 3He-A", P. Kumar, in "Quantum Fluids
and Solids", Ed. S. Trickey, E. D. Adams and J. Dufty, Plenum, New York (1977), p. 45.

19. "Planar Textures and Magnetic Resonance in Superfluid 3He-A", K. Maki and
P. Kumar, Phys. Rev. B16, 174 (1977).

20. "Composite Solitons and Magnetic Resonance in Superfluid 3He-A", K. Maki and
P. Kumar, Phys. Rev. B16, 182 (1977).

21. "Composite Solitons and Magnetic Resonance in Superfluid 3He-A:II", K. Maki
and P. Kumar, Phys. Rev. B17, 1088 (1978).

22. "n- Solitons in Superfluid 3He-B", K. Maki and P. Kumar, Phys. Rev. B16, 4805 (1977).

23. "Textures near the A-A1 transition in superfluid 3He", P. Kumar and Y. R. Lin-Liu,
Physica 94B, 205 (1978).

24. "Thermodynamics of Textures in Superfluid 3He-B", P. Kumar, Phys. Lett. 66A, 487 (1978).

25. "Surface Magnetism in Superfluid 3He", P. Kumar, Jour. de Physique C-6, 279 (1978).

26. "Texture Effects on Magnetic Resonance in Superfluid 3He-A",
D. Vollhardt and P. Kumar, Jour. de Physique C-6, 43 (1978).

27. "Interaction between Solitons in a Double Sine Gordon Equation", J. Shiefman and
P. Kumar, Physica Scripta 20, 435 (1979), special volume on solitons.

28. "Surface Magnetism in 3He: Thermodynamics", P. Kumar, Jour. Low Temp.
Physics 38, 655 (1979).

29. "Nuclear Spin Interactions in Copper: NMR at High Polarization in Low Fields",
J. P. Ekstrom, J. F. Jacquinot, M. T. Loponen, J. K. Soini and P. Kumar, Physics B+C 98, 45 (1979).

30. "Spin Density Wave Fluctuations in Copper Nuclear Spins", P. Kumar, M. T. Loponen
and L. H. Kjaldman, Phys. Rev. Lett. 44, 493 (1980).

31. "Nuclear Magnetism in Metals: Thermodynamics and Magnetic Resonance",
L. H. Kjaldman, P. Kumar, and M. T. Loponen, Phys. Rev. B 23, 2051 (1981).

32. "A Model for Solid 3He", R. Guyer and P. Kumar, J. Low Temp. Phys. 47 , 321, (1982).

33. "Quasi Solitons: A case study of the Double Sine-Gordon Equation", P. Kumar
and R. R. Holland in "Nonlinear Problems: Present and Future", ed. by A. Bishop,
D. K. Campbell and B. Nicolaides, North Holland, Amsterdam (1982), p. 229.

34. "Hydrogen Atoms at a Helium Surface", P. Kumar in "Proc. of XVI International
Conference on Low Temperature Physics", Ed. by W. G. Clark, Physica 108B, 939 (1981).

35. "Soliton Instability in a One Dimensional Magnet", P. Kumar, Phys. Rev. B25, 483 (1982).

36. "Solitons in an Easy Plane Ferromagnetic Chain", P. Kumar and V. K. Samalam,
Proc. 27th Annual Conference on Magnetism and Magnetic Materials,
J. App. Physics 53, 1856 (1982).

37. "Soliton Dynamics on a Ferromagnetic Chain", G. Wysin, A. Bishop and
P. Kumar, J. Phys. C. Solid St. 47, L-337, (1982).

38. "Soliton Instability in an Easy-plane Ferromagnet", P. Kumar, Physica D5, 359 (1982).

39. "Statistical Mechanics of an Easy-plane Ferromagnetic Chain", P. Kumar
and V. K. Samalam, Phys. Rev. Lett. 49, 1278 (1982).

40. "Statistical Mechanics of a Magnetic Chain," V. K. Samalam and P. Kumar.
Phys. Rev. B26, 5146 (1982).

41. "Model for the Absorption Rate of Gaseous CO2 by Solid Hydroxides,"
D. B. Houston, T. L. Bailey and P. Kumar in "The characterization of CO2
absorbing agents for Life Support Equipment" ed. by M. Nichols and K. Smith,
ASME, New York (1982).

42. "Hydrogen Atoms at a Helium Film Surface", B.G. Wilson and P. Kumar,
Phys. Rev. B27, 3076 (1983).

43. "Chaos in rf SQUIDs", K. Fesser, A. Bishop and P. Kumar, App. Phys. Lett. 43, l23 (1983).

44. "Soliton Dynamics on an Easy Plane Ferromagnetic Chain", G. Wysin,
A. Bishop and P. Kumar, J. Phys. C Solid State 17, 5975 (1984).

45. "Phase Diagram for Spontaneous Nuclear Magnetic Ordering in Copper",
by P. Kumar, J. Kurkijarvi and A. S. Oja, Phys. Rev. B31, 3194 (1985).

46. "Helical Structures of Nuclear Spins in a Metal", A. S. J. Oja and
P. Kumar, in the Proceedings of International Conference on Low Temperature
Physics - 17 (1984), ed. by Eckern, Schmid, Weber and Wuhl, Physica 126B, 451 (1984).

47. "The Anomalous Low Temperature Susceptibility of Solid 3 at High Molar
Volumes", P. Kumar and N. Sullivan, Phys. Rev. Lett. 55, 963 (1985).

48. "Nuclear Magnetism in a Metal", P. Kumar, J. Kurkijarvi and A. S. Oja,
Phys. Rev. B33, 444 (1986).

49. "Tunnelling, Supersymmetry and Riccati Equations", P. Kumar and M.
Ruiz-Altaba and B.S. Thomas, Phys. Rev. Lett. 57, 2749 (1986).

50. "Indirect Nuclear Spin Interactions in a Metal and Nuclear Magnetism in
Copper", A. S. Oja and P. Kumar, J. Low Temp. Phys. 66, 155 (1987).

51. "Thermomagnetic Transport Coefficients: Solitons in an Easy Plane Magnetic Chain",
G. M. Wysin and P. Kumar, Phys. Rev. B36, 7063 (1987).

52. "Magnetic Polarons in Low Density Solid 3He", P. Kumar and N. S. Sullivan,
Phys. Rev. B 35, 3162 (1987).

53. "Response to Comments by Jedrejzek and Kirk", P. Kumar and N. S. Sullivan,
Phys. Rev. Lett. 57, 2600 (1986).

54. "Nuclear Magnetism in Solid 3He", P. Kumar and N. S. Sullivan, Proceedings of the
International Conference on Quantum Fluids and Solids, Banff 1986, ed. J. Franck,
Can. J. of Phys. 65, 1543 (1987).

55. "A Two Component Order Parameter Model for Pure and Thorium-Doped
Superconducting UBe13", P. Kumar and P. Wolfle, Phys. Rev. Lett. 59 , 1954 (1987).

56. "Internal Modes of a Soliton", P. Kumar and B.S. Thomas, Phys. Rev. B37, 683 (1988).

57. "Multimagnon Analysis of Optical Linewidths: CsNiF3", P. Riseborough and P. Kumar,
J. Phys. C21, L185 (1988)

58. "Two Spin-Wave Spectra of Easy Plane Ferromagnetic Chain" P. S.
Riseborough and P. Kumar, J. Phys.:Cond. Matt. 1, 7439 (1989).

59. "Supercurrent Tunnelling Between Conventional and Unconventional Superconductors:
A Ginzburg-Landau Approach," S. K. Yip, O. F. De Alacantara Bonfim and
P. Kumar, Phys. Rev. B41, 11214 (1990).

60. "Fluctuation Effects in the Phase Separation of Solid 3He-4He Mixtures," P. Kumar
and M. Bernier, J. Low Temp. Phys. 79, 1 (1990).

61. "Thermodynamic Considerations and the Phase Diagram of UPt3," S. K. Yip,
T. Li and P. Kumar, Phys. Rev. B43, 2742 (1990).

62. "Effect of Anisotropy in the Abrikosov Phase of Copper Oxide Superconductors,"
K. Ziegler and P. Kumar, Z. Phys. B-Cond. Matt. 82 , 335 (1991).

63. "Effect of Short Coherence Length on the Critical Current," P. Kumar, S. G. Mishra
and S. K. Yip, in "Science and Technology of Thin Film Superconductors 2" ed.
by B. McConnell and R. Nouffi, Plenum Press, NY (1991).

64. "Universal Effects of Surface Roughness on the Critical Current of Superfluid 4He
in Narrow Pores", Mark W. Meisel and Pradeep Kumar, Physica B165&166, 579 (1990).

65. "Fluctuation Effects in Phase Segregation", P. Kumar and M. Bernier,
Physica B 165 &166, 815 (1990).

66. "Effect of Finite Size Distribution upon the Interpretation of Quantum Confinement
in CdTe Crystals", J. H. Simmons, B. G. Potter Jr., P. Kumar and T. M. Neidt,
in "Ceramic Transactions", M. D. Sacks ed., American Ceramic Society,
Westerville, Ohio (1991)

67. "Magnetic Behavior of Ce1-xThxCu2Si2 for x > 0.75", J. S. Kim, C. S. Jee, W. W. Kim,
B. Andraka, P. Kumar and G. Stewart, Phys. Rev. B44 , 7473 (1991)

68. "Dynamics of the Phase Separation in Solid Solutions of 3He-4He", M. Bernier
and P. Kumar, Phys. Rev. B44, 4355, (1991).

69. "Properties of Superlattices made of high Tc superconductors", P. Kumar, R. A. Guyer,
S. Obukhov and Y. Sun, in "High Temperature Superconductivity: Physical Properties,
Microscopic Theory and Mechanisms", ed. by J. Ashkenazi, S. E. Barnes, F. Zuo, G. Vezzoli
and B. M. Klein, Plenum Press NY (1992)

70. "A Phenomenological Approach to Superconducting Transition in Thin Films and
S-N Superlattices", R. A. Guyer, P. Kumar, S. Obukhov and Y. Sun,
Physica C195, 263 (1991)

71. "Quasi-particle Spectrum and the Effect of Spin Paramagnetism in Very High Field
Superconductivity," V. Nikos Nicopoulos and P. Kumar, in "Physical Phenomena at
High Magnetic Fields", ed. by E. Manousakis, P. Schlottmann, P. Kumar, K. S. Bedell
and F. M. Mueller, Addison Wesley NY (1991).

72. "Planar Superconductive Pairing and the Gap in High Magnetic Fields," V. N. Nikopoulos
and P. Kumar, Phys. Rev. B44, 12080 (1991)

73. "Contribution to the ground state energy of Fermi systems due to low lying fluctuation
excitations", Y. S. Sun, T. Li and P. Kumar, Phys. Rev. B45, 3792 (1992)

74. "Magnetic Field Investigation of the 1K Transition in UCu5", B. Andraka, J. Dapprich, M.
Baldus, P. Kumar and G. Stewart, Phys. Rev. B45, 7481 (1992)

75. "Phonon Heat Capacity in Small Insulating Grains" P. Kumar and V. N. Nicopoulos,
UF preprint (1992)

76. "Intensity of the 2L NMR line in Gold at Nanokelvin Temperatures" P. L. Moyland,
P. Kumar and Y. Takano, Proc. of the XX International Conference on Low Temperature
Physics, ed. by R. Donnelly, North Holland, Amsterdam (1994) Physica B 194--196, 349 (1994)

77. "Magnetic and Transport Properties in 214 Oxides: Dependence on Doping" L. P. Gorkov,
V. N. Nikopoulos and P. Kumar, in the Proceedings of the International Conference on
Molecular and Oxide Superconductors, ed. by V. Kresin et al, (Eugene, Oregon, July 1993),
Journal of Superconductivity 7, 505 (1994).

78. "Coupling of the Larmor Precession to the Correlated Motion of Pairs of Nuclear Spins in
Noble Metals" P. L. Moyland, Pradeep Kumar, J, Xu and Y. Takano, Phys. Rev. B48, 14020 (1993)

79. "Ehrenfest Order of Transitions in Bi based Superconductors" P. Kumar, Proceedings of
International Conference on Strongly Correlated Electron Systems-93, ed. by R. Guertin et al,
North Holland, Amsterdam (1994), Physica B 199--200, 409 (1994)

80. "On the Phase Diagram of La2--xSrxCuO4" L. P. Gorkov and P. Kumar, in "Strongly
Correlated Metals", ed. by K. S. Bedell and A. Balatsky, Addison Wesley, Redwood City, CA (1994).

81. "Effects of Next Nearest Neighbor Hopping on Hole motion in an Antiferromagnetic Background",
A. Schiller, P. Kumar, R. Strack and D. Vollhardt, Phys. Rev. B51, 8337 (1995)

82. "A Model for Solid 3He:II" J. Dubois and P. Kumar, Journal of Low Temp. Phys. 98, 37 (1994)

83. "Hole Spectrum in the Three Band Model", L. P. Gorkov and P. Kumar in "Proceedings of
10th Anniversary HTS Workshop on Physics Materials and Applications", ed. by B. Batlogg
et al, World Scientific, Singapore, p 501 (1996).

84. "Back to a Mean Field Hole Spectrum in the Three band Model", L. P. Gorkov and P. Kumar,
Philosophical Magazine 75, 319 (1997)

85. "Properties of Phase Transitions of a Higher Order". P. Kumar, J. Low Temp. Phys. 106, 705 (1997)

86. "Phase Transitions of Nuclear Spins at Negative Temperatures", P. Kumar, preprint (1996)

87. "Coherent Phonons and Heat Capacity of Small Insulating Grains", V. Nikos Nicopoulos
and P. Kumar, preprint (1997)

88. "Exchange Interaction between Nuclear Spins", a paper in the festschrift volume in honor
of Professor E. Raymond Andrew, Solid State Nuclear magnetic Resonance, 9, 55,(1997)

89. "Specific Heat Measurements near the Two Irregular Points in the Phase Diagram of
U(1-x) ThxBe13" T. Schreiner, E. -W. Scheidt, P. Kumar and G. R. Stewart,
SCES-98, Paris. Physica B261, 625-626, (1999)

90. "Magnetization Measurements on Single Crystals of Superconducting Ba0.6 K0.4BiO3"
Donovan Hall, R. G. Goodrich, C. G. Grenier, Pradeep Kumar, M. Chaparala, M. L. Norton,
Philosophical Magazine B80, 61-79 (2000) cond-mat/9912160

91. "A Specific Heat Study in U(1-x) ThxBe13 : Enormous \DeltaC and Strong Coupling at
x=xc1 and xc2 ; Correlation between \DeltaC and Unusual Superconductivity", E. -W. Scheidt,
T. Schreiner, Pradeep Kumar and G. R. Stewart, Phys. Rev. B58, 15153 (1998)

92. "Thermodynamics of a Superconducting Phase Transition in Ba 0.6 K0.4 BiO3", P. Kumar,
D. Hall and R. G. Goodrich, Phys. Rev. Lett. 82, 4532 (1999). cond-mat/9904288
This paper has also been selected for PRfocus, a non-technical presentation of selected PRL papers.

93. "Magnetic Field Study of Ce0.8La0.2Al 3", R. Pietri, P. Kumar and B. Andraka,
Jou. App. Phys. 87, 5129-5130, (2000)

94. "Collective Mode in a dx2-y2+idxy Superconductor", A. V. Balatsky, P. Kumar and
J. R. Schrieffer, Phys. Rev. Lett. 84, 4445 (2000) cond-mat/9910342

95. "A Comment on ``Superconducting-Normal Phase Transition in (Ba1-xKx)BiO3,
x = 0.40, 0.47'' by B. F. Woodfield, D. A. Wright, R. A. Fisher, N. E. Phillips and H. Y.
Tang, Phys. Rev. Lett. 83, 4622 (1999)", P. Kumar, Donavan Hall and R. G. Goodrich,
cond-mat/9912164

96. "Clapping Modes in Unconventional Superconductors", A. V. Balatsky, P. Kumar and
J. R. Schrieffer, Proceedings of M2S Conference on Superconductivity, Houston, TX,
February 2000. Physica C 341, 807-810 (2000) cond-mat/0009111

97. "Thermodynamics of a Higher Order Phase Transition: Scaling Exponents and Scaling Laws",
P. Kumar and A. B. Saxena, Presented at the March '00 meeting of the American Physical
Society, Minneapolis, MN. Philosophical Magazine B82, 1201-1209 (2002) cond-mat/0205002

98. "Phonon Modes and Heat Conductance in a Free-Standing Nanowire", S. E. Patamia and
P. Kumar, preprint UF (2001).

99. "Field Induced Transition in the Specific Heat of CeIrIn5 , B>30T", J. S. Kim, J. Alwood,
P. Kumar and G. R. Stewart, Phys. Rev. B65, 174520 (2002)

100. "Specific Heat Anomaly for H>28.5 T in CeIrIn5", J. S. Kim, J.. Alwood, P. Kumar and
G. Stewart, in Proceedings of the PPHMF-IV, ed. by G. Boebinger, Z. Fisk, L. P. Gorkov,
A. Lacerda and J. R. Schrieffer, p. 104-107, World Scientifc, Singapore (2002).

101. "Specific Heat of URu2Si2 in Fields to 42T: Clues to the Hidden Order", J. S. Kim,
D. Hall, P. Kumar and G. R. Stewart, Phys. Rev. B67, 014404 (2003). cond-mat/0301234

102. "Theory of a Higher Order Phase Transition: Superconducting Transition in BKBO",
P. Kumar, Phys. Rev. B68, 064505 (2003). cond-mat/0207373.

103. "A Collective Heavy Fermion State and Superconductivity in Pr$_{1-x}$La$_x$Os$_4$Sb$_{12}$:
A Specific Heat Study", C.R. Rotundu, P. Kumar, B. Andraka , Phys. Rev. 73, 014515 (2006)
cond-mat/0402599.

104. "Spatial Structures in a Generalized Ginzburg-Landau Free Energy", Abdel-Khalek Farid,
Yonggang Yu, Avadh Saxena and Pradeep Kumar, Phys. Rev. B71, 104509 (2005). cond-mat/0408002.

105. "Spurious Second Transition in the Heavy Fermion Superconductor CePt3Si", J. S. Kim,
D. J. Mixson, D. Burnette, T. Jones, P. Kumar, B. Andraka, G. R. Stewart, V. Cracium, W. Acree,
H. Q. Yuan, D. Vandervelde and M. Salamon, Phys. Rev. 71, 212505 (2005).

106. "Evolution of superconductivity in Pr1-xLaxOs4Sb12: Upper critical field measurements"
C. R. Rotundu, H. Tsuji, P. Kumar, B. Andraka, H. Sugawara, Y. Aoki and H. Sato, UF preprint (2006)
cond-mat/06.....

107. "Complex Phase Diagrams", P. Kumar, Philosophical Magazine 89, 1771 (2009).

108. "Superconductivity and Disorder in PrOs₄Sb₁₂", M. E. McBriarty, P. Kumar, G. R. Stewart and B. Andraka,
J. Phys: Conden. Matter 21, 385701-5 (2009).

109. "Investigation of the Heavy Fermion state and Superconductivity in Pr_1-xLa_xOs₄Sb₁₂ by the Upper
Critical Field Slope at T_c", B. Andraka, C. R. Rotundu, P. Kumar and H. Tsuji, J. Phys:
Conden. Matter 22, 345701-5 (2010).

110. "Multiferroic Thermodynamics", G. R. Boyd, S. R. Phillpot and P. Kumar, arxiv/1101.5403.

111. "Multiferroic Materials and their Properties", P. Kumar, Integrated Ferroelectrics: An International Journal,
131, 25-35(2011).

112. "Metamagnetism and the Fifth Order Susceptibility in UPt3", B.S.Shivaram, Brian Dorsey, D.G. Hinks
and Pradeep Kumar, arXiv:1403.1970, Phys. Rev. B89, 161108(R) (2014).

113. "Universality in the Magnetic Response of Metamagnetic Metals", B.S. Shivaram, D.G. Hinks, M. B. Maple,
M.A.deAndrade, P. Kumar, arXiv:1403.0742, Phys. Rev. B89, 241107(R) (2014).

114. "High-field ultrasoound measuremetns in UPt3 and the single-energy-scale model of metamagnetism", B. S.
Shivaram, V. W. Ulrich, Pradeep Kuamr and V. Celli, Phys. Rev. B91, 115110 (2015). arXiv:1502.03412.

115. "Proximate transition temperatures amplify linear magnetoelectric coupling in strain-disordered multiferroic
BiMnO3", Patrick R. Mickel, Hyoungjeen Jeen, Pradeep Kumar, Amlan Biswas, Arthur F. Hebard, Phys. Rev. B93,
134205 (2016). arXiv:1508.01744

116. "The linear and non-linear magnetic response of a tri-uranium single molecule magnet" B. S. Shivaram, E. Colineau,
J. Griveau, P. Kumar and V. Celli. J. of Physics-Condensned Matter 29, 095805 (2017).

117. "Temperature Dependennce of Nonlinear Susceptibilities in an Infinite Range Interaction Model", Pradeep Kumar and
Christopher E. Wagner, arXiv:1703.08576, 2018 J. Phys.:Condens. Matter https://doi.org/10.1088/1361-648X/aad3e7

Supervised Theses:

"Adiabatic Nonlinear Dynamics in Models of Quasi One-Dimensional Conjugated Polymers",
S. R. Phillpot, Doctor of Philosophy, University of Florida (1985).

"Spectrum and Properties of Mesoscopic Surface-Coupled Phonons in Rectangular Wires",
S. E. Patamia, Doctor of Philosophy, University of Florida (2001)

The work on following theses was done partly under my supervision

"Classical Kink Dynamics and Quantum Thermodynamics in Easy-Plane Magnetic Chains with
an applied Magnetic Field" G. M. Wysin, Ph. D. , Cornell University (1985).

"Nuclear Magnetic Ordering in Copper", A. S. J. Oja, Diploma,
Helsinki University of Technology (1984).

"Nuclear Magnetism in Copper and Silver: Theory and Experiments"
A. S. J. Oja, Ph. D., Helsinki University of Technology (1988).

Books, edited:

"Nonlinearity in Condensed Matter", ed. by A. R. Bishop, D. K. Campbell, P. Kumar and S. Trullinger, Springer Ser. Solid State Sci. (Springer, Berlin and Heidelberg, 1987).

"Physical Phenomena at High Magnetic Fields"
Proceedings of an International Conference held at Tallahassee, FL. May 1991.
Ed. by E. Manousakis, P. Schlottmann, P. Kumar, K. S. Bedell and F. M. Mueller,
Addison Wesley, NewYork (1992)

Prof. Kumar's Homepage