题目: Electronic state control in layered quantum materials

时间: 2023年09月05日 14:00

地点: M253会议室

报告人: Haijing Zhang

Max-Planck-Institute for Chemical Physics of Solids, Dresden, Germany

报告摘要：

The multifunctional behaviors of quantum materials are driven by the intricate interplay between charge, orbital and spin degrees of freedom. Advances in modern field-effect devices allow for unprecedented control of these degrees of freedom, revealing a plethora of exotic physical phenomena such as superconductivity and long-range magnetic order. In this talk, I will provide an overview of our recent progress in controlling the emerging physical phenomena in layered quantum devices and how they offer new insights to the underlying physics. First, I will discuss the observation of a spontaneous anomalous Hall effect, a trademark of time-reversal symmetry breaking, in a doped layered polar semiconductor. Notably, the magnitude of anomalous Hall conductivity can be enhanced by tuning the carrier density, which sheds new light on the interplay of magnetic and ferroelectric-like responses [1]. Next, I will present recent results on the electric field control at the interfaces of ionic gated tellurium thin flake devices, demonstrating a fourfold increase in the Rashba spin-orbit coupling coefficient.

References

[1] S. Kim et al. arXiv:2307.03541

报告人简介：

Haijing Zhang received her bachelor degree from Nanjing University and obtained her Ph.D in physics from the Hong Kong University of Science and Technology (HKUST). From 2014 to 2019, she worked as a post-doctoral fellow in the Physics Department of HKUST and the Department of Quantum Matter Physics at the University of Geneva. In October 2019, she joined the Max Planck Institute for Chemical Physics of Solids in Germany as a group leader. Her research interests primarily focus on the quantum and mesoscopic transport properties of correlated systems, as well as gate-controlled electronic phases transitions in layered quantum materials.

联系人：陈其宏 特聘研究员