Jason R Jeffries

Group Leader, High Pressure Physics
Physics Division
Email: jeffries4@llnl.gov
Phone: +19254224734


  • Ph.D., Condensed Matter Physics, University of California, San Diego, 2007
  • B.S., Physics, Clemson University, 2000

Research Interests

Jason Jeffries is a condensed matter physicist and group leader for the High Pressure Physics group in the Physics Division at Lawrence Livermore National Laboratory. During his graduate studies, Jason worked under Professor M. Brian Maple studying superconductivity and magnetism under pressure. At LLNL, he studies how magnetic, electrical, and structural degrees of freedom affect the physical properties of materials. His interests include a wide range of materials from f-electron-bearing materials (lanthanide and actinide materials) to “simple,” p-block compounds. However, the systems that he studies generally possess the common attribute that quantum effects (e.g., strong spin-orbit coupling and strong electronic correlations) dominate the emergent properties: these materials are often simply called quantum materials. He often employs high-pressure diamond anvil cell techniques and characterizations, including x-ray and neutron scattering, to explore a wide phase space of structural and quantum parameters.

Recent Publications