Speaker: Prof. Laura H. Greene,
National High Magnetic Field Laboratory, Florida State University and the Center for Emergent Superconductivity
Florida State University • University of Florida • Los Alamos National Laboratory 1800 E. Paul Dirac Drive, Florida State University, Tallahassee, FL 32310 USA
Date: 2016年5月12日上午10:00-11:00,
Location: 唐仲英楼B501
Abstract：
At we pass the centenary of the discovery of superconductivity, the design of new and more useful superconductors remains as enigmatic as ever. As high-density current carriers with little or no power loss, high-temperature superconductors (HTS) offer unique solutions to fundamental grid challenges of the 21st century and hold great promise in addressing our global energy challenge in energy production, storage, and distribution. Traditionally guided by serendipity, our recent materials genome initiative is geared to develop predictive design of HTS. In this pursuit, we have chosen point contact spectroscopy (PCS) to aid in identifying promising candidates; as we have proved PCS to be an identifier of non-Fermi liquid (NFL) behavior above Tc, ubiquitous to all unconventional superconductors. We present a new definition of unconventional superconductivity; that the electronic fluid in the normal state is NFL, and that not necessarily the superconducting order parameter breaks the symmetry of the underlying lattice. We present how these studies will help to categorize and identify promising new HTS candidates.
Bio：
Prof. Laura H. Greene, 现任美国强磁场国家实验室主任科学家，美国科学院院士。长期在凝聚态物理，关联电子态和超导方面工作。主要利用点接触隧道谱在重费米子，非常规超导，拓扑绝缘体等方面开展大量的工作。是国际著名的科学活动组织者和教育家，多家学术杂志副主编和编委，Reports on Progress in Physics杂志主编，在国际学术场合作报告400余场，发表学术论文200余篇，论文引用9000余次，h-index 48。获得国际学术奖项和学术组织奖多项。
Expertise:
My research is in experimental condensed matter physics investigating strongly correlated electron systems. Much of my research focuses on fundamental studies to determine the mechanisms of unconventional superconductivity by planar tunneling and point contact electron spectroscopies, and on developing methods for predictive design of new families of superconducting materials. In our quest for these long-term goals, we perform spectroscopic studies of the electronic structure of heavy fermions, topological insulators and superconductors, and other novel materials that show strong electronic correlations. We also incorporate studies of superconducting proximity effects on novel normal-state and superconducting materials.