Microkelvin People
Faculty
| James Hamlin |  |
Email: Phone: 352.392.4947 Office: NPB 2263 |
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| Dr. Hamlin's research is directed towards utilizing a combination of materials synthesis, ambient pressure characterization, and high pressure and high magnetic field measurements to advance our understanding of novel and potentially useful electronic and magnetic materials. In particular, we study the formation of unconventional and/or high temperature superconducting states in the vicinity of quantum phase transitions, although in the course of characterizing new materials, other phenomena are also investigated. | |
| Chao Huan |  |
Email: huan@ufl.edu Phone: 352.846.0823 Office: Williamson 283
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| Dr. Huan's research is mainly focused on the experimental investigation of the dynamics of quantum solid and liquid at low temperature with NMR methods. He am also interested in the quantum transport in mesoscopic systems. | |
| Dominique LaRoche |  |
Email: Phone: 352.392.8591 Office: NPB 2261 |
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| Dr. Laroche’s research is directed towards the design and fabrication of quantum-devices coupled at the nanoscale and in the study of the interactions that arise between these closely packed systems at ultra-low temperatures. Dr. Laroche’s current interests include the study of electron-electron interactions in Luttinger liquids, topological quantum computing with Majorana quasiparticles, induced superconductivity in low-dimensional systems and quantum transport in high mobility bilayer heterostructures. | |
| Yoonseok Lee |  |
Email: Phone: 352.392.6689 Office: NPB 2233 |
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| Dr. Lee and collaborators explore the low temperature properties of superfluid helium three, using ultrasound and thermodynamic techniques to understand the nature of p-wave pairing. His recent interest is in understanding the role of various disorder in bulk and thin films of superfluid helium three. For this purpose, he has developed novel micro-machined mechanical oscillators or MEMS oscillators using silicon nano-fabrication technology. | |
| Mark Meisel |
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Email: meisel@phys.ufl.edu Phone: 352.392.8867 Office: NPB 2358 | |
| Dr. Meisel studies the electromagnetic and thermodynamic properties of a variety of systems exhibiting quantum mechanical phenomena. In the millikelvin temperature range, the research focuses on novel superconducting and heavy fermion materials, low dimensional organic and inorganic conductors and magnets, and nanostructured antiferromagnetic particles. The millikelvin research is extended to the microkelvin regime when the behavior of the systems requires further clarification. | |
| Neil Sullivan |  |
Email: Phone: 352.846.3137 Office: NPB 2235 | |
Dr. Sullivan and colleagues investigate the fundamental dynamics of quantum solids (H2, 3He, 4He, HD,....) at very low temperatures using modern NMR techniques. The orientational ordering of molecular crystals, both quantum rotors (H2) and classical rotors (N2) are being studied to determine the quadrupolar glass ordering. The group also studies the quantum diffusion of isotopic impurities 3He in 4He and HD in solid para-H2 both experimentally and theoretically. |
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| Lucia Steinke |  |
Email: lucia.steinke@ufl.edu Phone: 352.392.0521 Office: NPB |
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| Dr. Steinke is the Microkelvin Lab Manager and Microkelvin/Williamson Hall Safety Person. | |
| Yasumasa Takano |  |
Email: takano@phys.ufl.edu Phone: 352.402.9326 Office: NPB 2356 |
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| Dr. Takano studies quantum magnetism, nuclear magnetism, quantum fluids, and quantum solids. | |
Staff
| Naoto Masuhara | 
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Email: Phone: 352.392.8869 Office: Microkelvin Laboratory |
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| Dr. Masuhara, a senior engineer, is responsible for the operations and user support for Bay 2 of NHMFL High B/T Facility and the operation of the Microkelvin Laboratory building. His specialty includes magnetic resonances, ultrasound spectroscopy, non-linear optical spectroscopy and ultra-low temperature techniques. His recent interest is focused on developing novel experimental methods by combining different techniques to measure new properties of quantum matter. | |
| Amy C. Howe |  |
Email: amy.howe@ufl.edu Phone: 352.294.4786 Office: MBI LG-115 |
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| Amy is the outreach coordinator for the National High Magnetic Field Lab at the University of Florida. She is responsible for the MagLab REU program at UF and maintains the Microkelvin website. | |
Postdoctoral Associates
| Andrew Woods |  |
Email: Phone: 352.392.0485 Office: Williamson 113 |
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| Dr. Woods’ research has focused on the study of quantum turbulence in superfluid 3He and 4He using vibrating objects such as wires and tuning forks. In particular the development of a two-dimensional quasiparticle detector for use in visualising quantum turbulence in superfluid 3He-B at ultra-low temperatures (< 200 μK). Turbulence in classical fluids is an incredibly complex, unsolved mathematical problem. Turbulence in quantum fluids is conceptually much more simple, and investigating its properties may reveal information which leads to a more complete understanding of the behavior of all turbulent systems. | |
Visitors
| Ryuji Nomura |
Microkelvin visitor from March 11-18, 2018 and March 19-24, 2019 Host: Yoonseok Lee Professor Nomura is an Assistant Professor at Tokyo Institute of Technology. His research interest is in two areas: quantum crystal growth and topological phenomena in quantum condensates. He is a leading investigator in solid formation in superfluid 4He especially in zero gravity and topological surface states in superfluid 3He. He is currently conducting experiments on Bay 3 of the High B/T facility in collaboration with Yoon Lee to investigate the spin-degrees of freedom of surface Andreev bound states in the non-unitary A1 phase of superfluid 3He in high magnetic fields.
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| Viktor Tsepelin |
Microkelvin visitor from April 15 - May 3, 2017 Host: Yoonseok Lee Victor Tseplin is Reader in Physics at Lancaster University. He will give a colloquium on April 20, 2017 titled “TBpA“ and a special condensed matter physics seminar on “ TBA”. His research interest is mainly in understanding the nature of quantum turbulence in superfluid 4He and 3He at ultra low temperatures. His group is involved in developing a technique for visualization of vortices.
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| Brian P. Cowan | Microkelvin visitor from November 28 - December 1, 2016
Brian Cowan is Professor of Physics at Royal Holloway University of London and is a world expert on the use of NMR techniques and thermodynamic techniques to study quantum fluids and solids at very low temperatures. His current research includes topological superfluids under engineered nanofluidic confinement; and quantum phase transitions and quantum criticality in helium films. He is collaborating with the NHMFL High B/T facility on a review paper on the phase separation of sold 3He-4He mixtures. |
Alumni
| Postdoctoral Appointees | Years at Microkelvin | Current Employment |
| Johan Bremer | 1993-94 | CERN |
| Vladimir Shvarts | 2001-02 | Janis Research |
| Hikota Akimoto | 2000-03 | Riken, Japan |
| C. L. Vicente | 2004-07 | University of Puerto Rico |
| Chao Huan | 2007-09 | NHMFL High B/T |
| Alessandro Serafin | 2012-16 | Amherst Center for Fundamental Interactions |
| Doctoral Students | Graduation Year | Dissertation Title |
| Wenhai Ni | 1994 | Melting pressure thermometry and magnetically order solid 3He |
| Paul Moyland | 1997 | Nuclear magnetism and negative temperatures in silver |
| Edgar Genio | 1997 | Low Temperature Nuclear Quadrupole Resonance Studies of Antimony and Application of Thermometry |
| Garrett E. Granroth | 1998 | Experimental Studies of Integer Spin Antiferromagnetic Chain |
| Brian C. Watson | 2000 | Quantum Transitions in Antiferromagnets and Liquid Helium-3 |
| Tood Sherline | 2006 | Antiferromagnetism in Cesium Tetrabromocuprate (II) and Body-Centered-Cubic Solid Helium Three |
| Byoung Hee Moon | 2010 | Study on the effects of anisotropic disorder on superfluid 3He in high porosity aerogel using longitudinal ultrasound |
| SungSu Kim | 2011 | A study of nuclear spin relaxation in isotopic mixture of dilute 3He in solid 4He using NMR |
| Miguel Gonzalez | 2012 | Development and Application of MEMS Devices for the Study of Liquid 3He |
