Office: 2249 NPB
352.392.3898

Lab: B-40-48 NPB

andraka@phys.ufl.edu












































Bohdan Andraka

Research Associate Professor


Education

PhD Temple University (1986)

Research Group

Condensed Matter Experiment

Research Interest

Synthesis and investigation of strongly correlated electron systems: heavy fermions, organic and oxide superconductors, non-Fermi liquids, and hybridization gap materials. Problems of current interest include the origin of non-Fermi liquid behavior, role of anisotropy in Ce-Kondo lattices and anisotropic Kondo model, coexistence of heavy fermions and long range order, role of magnetic frustration in the formation of heavy fermion states, U-spin glasses, Fermi-liquid description of canonical heavy fermion materials, single-impurity limit of U-based heavy fermions, and verification of exotic single-impurity models. Most recent studies include also quantum magnets in high magnetic fields and exotic electronic states in skutterudites. Structural, transport, magnetic, and thermodynamic studies are carried out at the University of Florida and in collaboration with partners at Florida, Polish Academy of Sciences, University of California at Riverside, and others. Research is supported by individual grants from the Department of Energy, National Science Foundation, and National High Magnetic Field Laboratory.

Select Publications

High magnetic field phase diagram of PrOs4Sb12, C.R. Rotundu, H. Tsujii, Y. Takano, B. Andraka, H. Sugawara, Y. Aoki, and H. Sato, Phys. Rev. Lett. 92, 037203 (2004).

A dilute limit of CeAl3: Emergence of the single-ion Kondo scaling, C. R. Rotundu, H. Tsujii, Y. Takano, and Andraka B, cond-mat/0404595 (submitted to Phys. Rev. Lett.)

Specific heat of the two-dimensional Shastry-Sutherland antiferromagnet SrCu2(BO3)2 in high magnetic fields”, H. Tsujii, C.R. Rotundu, B. Andraka, Y. Takano, H. Kageyama, and Y. Ueda, cond-mat/0301509 (submitted to Phys. Rev. Lett.)

High-field phase diagram of the Haldane-gap antiferromagnet Ni (C5H14N2)2N3(PF6)”, H. Tsujii, Z. Honda, B. Andraka, K. Katsumata, and Y. Takano, Phys. Rev. B 71, 014426 (2005).

A collective heavy Fermion state and superconductivity in Pr1-xLaxOs4Sb12: Specific heat and susceptibility study, cond-mat/0402599, C.R. Rotundu, P. Kumar, and B. Andraka (submitted to Phys. Rev. Lett.).

Specific heat of Ce0.8La0.2Al3 in magnetic fields: A Test of the Anisotropic Kondo picture, R. Pietri, K. Ingersent, and B. Andraka, Phys. Rev. Lett. 86, 1090 (2001).