Microkelvin People


James Hamlin


Phone: 352.392.4947

Office: NPB 2263

Personal Website

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


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.
Yoonseok Lee


Phone: 352.392.6689

Office: NPB 2233

Personal Website

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 Mesiel

Email: meisel@phys.ufl.edu

Phone: 352.392.8867

Office: NPB 2358

Personal Website

Dr. Mesiel 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


Phone: 352.846.3137

Office: NPB 2235

Personal Website

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.

Yasumasa Takano

Email: takano@phys.ufl.edu

Phone: 352.402.9326

Office: NPB 2356

Personal Website

Dr. Takano studies quantum magnetism, nuclear magnetism, quantum fluids, and quantum solids.
Jian-sheng Xia

Email: jsxia@phys.ufl.edu

Phone: 352.402.0484

Office: WM 119

Personal Website

Dr. Xia is the operations manager for the High B/T Facility. He works with users in the design of their experimental cells and on the scheduling of their experiments. He has developed a number of unique technologies fir high sensitivity measurements at ultra-low temperatures. These include rotators for use in transport measurements at sub-mK temperatures, magnetic susceptibility cells using superfluid 3He for thermal contact and helium-three melting curve thermometers.


Naoto Masuhara


Phone: 352.392.8869

Office: Microkelvin Laboratory

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.
Elizabeth Webb

Email: webbe@ufl.edu

Phone: 352.294.4786

Office: MBI LG-124

Elizabeth 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


Phone: 352.392.0485

Office: Williamson 113

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.


Viktor Tsepelin

Microkelvin visitor from April 15 - May 3, 2017

Personal Website

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.


Brian P. Cowan
Microkelvin visitor from November 28 - December 1, 2016

Personal Website

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.


Postdoctoral Appointees Years at Microkelvin Current Employment
Johan Bremer 1993-94 CERN
Vladimir Shvarts 2001-02 Janis Research
Hikota Akimoto 2000-03 Riken, Japan
Chao Huan 2007-09 NHMFL High B/T
Alessandro Serafin 2012-16  
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
Byoung Hee Moon 2010 Study on the effects of anisotropic disorder on superfluid 3He in high porosity aerogel using longitudinal ultrasound
Tood Sherline 2006 Antiferromagnetism in Cesium Tetrabromocuprate (II) and Body-Centered-Cubic Solid Helium Three
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

Supported by: The National High Magnetic Field Lab | The National Science Foundation | The State of Florida | The University of Florida

Contact Webbmaster | Page updated: December 16, 2016