Boston College
腾讯会议：316-639-390
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报告摘要：
Raman scattering, invented at the end of the last pandemic, can provide a wealth of information on the fractional, magnetic, lattice and charge excitations at the heart of quantum materials and devices. I will first discuss how Raman provides direct evidence for coupled phonon-electron fluids in topological semimetals, helping to explain their remarkable transport mobilities. Next I will discuss our recent discovery of the Axial Higgs Mode from the combination of quantum geometry and strong correlations in a topological semimetal. This demonstrates the power of Raman to reveal the vector properties of a low energy mode, heralds the discovery of the first unconventional charge density wave and multi-component symmetry breaking transition. Time permitting I will discuss our efforts to use quantum materials in nano devices, including modulation doping with RuCl3 and biosensing with graphene.
报告人简介：
Kenneth Burch has been a Professor of Physics at Boston College since 2014, running the Laboratory for Assembly and Spectroscopy of Emergence (LASE). Before arriving at BC, he was an assistant professor at the U. of Toronto for 5 years. He is a former Director’s fellow at Los Alamos National Laboratory, where he performed ultrafast spectroscopy with A. Taylor, and was a graduate student of D. Basov studying the optical properties of magnetic materials at UCSD. He has made seminal contributions to the development of novel techniques to understand and exploit quantum materials. This includes discovering the Axial Higgs Mode in a Charge Density Wave, the colossal bulk photovoltaic effect in a Weyl semimetal, modulation doping in 2D materials, fractional spin excitations in a potential Kitaev spin liquid, and he developed cutting-edge biosensors based on graphene. His group also developed a cleanroom in a glovebox where all fabrication and heterostructure preparation is performed. For his work, he was named an APS fellow, received the Lee-Asheroff-Riuchardson Prize, and the APS GMAG best dissertation award. The work also resulted in over 90 publications in high-impact journals, including: Nature, Advanced Materials, Nature Materials, Nano Letters, ACS Nano, Physical Review X, Biosensors and Bioelectronics, multiple patents, and is supported by NIH, NSF, DOE, ONR, AFOSR, ARO, BARDA, GRIP molecular and GINER Inc.
邀请人：王亚娴 副研究员
联系人：张坚地 研究员（9454）