Physics Department - Electron-Boson Interactions across Two Disparate Energy Scales: From Polarons and Excitons to Plasmons
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Abstract
In this talk, I will present our recent progress on electron-boson interactions and related quantum phenomena. First, I introduce the Holstein model for inelastic electron-phonon scattering, incorporating spin-orbit coupling that shifts the ground-state momentum from Γ to a finite k. We develop a high-precision method for calculating the effective mass—a quantity recently probed via exciton diamagnetic shift experiments. Second, we predict unique plasmon modes arising from spin/charge density waves coupled to photons. For GHz-frequency photon-electron interactions, we have devised an inverse-design patent on Ising machine for engineering electric and magnetic response functions. Finally, I will briefly touch on the half-integer quantum Hall effect and our latest work on Berry-phase-tunable flat-band models in the presence of correlated disorder.
Dr. Zhou Li received his B.Sc. in 2004 from Nanjing University, his M.Sc. in 2007 from Peking University, and his Ph.D. in 2012 from the University of Alberta. He subsequently conducted postdoctoral and visiting research at McMaster University, RIKEN (Japan), and Purdue University. In 2020, he returned to China to join the Guangdong Greater Bay Area Institute of Aerospace Information Technology as a Principal Investigator (PI) and group leader. He was an invited speaker at the APS March Meeting in 2014.