Field controlled emerging physics in the layered quantum materials

Date

Feb 15, 2024

Time

10:00 AM - 11:00 AM

Speaker

Dr. Haijing Zhang

Affiliation

MPI - CPfS, Dresden

Language

en

Main Topic

Materialien

Host

Grit Rötzer

Description

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 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 [1]. Next, 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 [2, 3]. If time permits, I will also discuss our ongoing efforts to investigate the pairing symmetry of the layered Kagome superconductors. [1] D. Fartab, J. Guimaraes, M. Schmidt, and H. Zhang*, Physical Review B, 108, 115305 (2023). [2] S. Kim, J. Zhu, M. M. Piva, M. Schmidt, D. Fartab, A. P. Mackenzie, M. Baenitz, M. Nicklas, H. Rosner, A. M. Cook, R. G. Hernández, L. Šmejkal and H. Zhang*, Advanced Science, 202307306 (2023). [3] J. Guimaraes, D. Fartab, M. Moravec, M. Schmidt, B. Schmidt and H. Zhang*, manuscript submitted. .

Links

• Seminars at the IFW

Last modified: Feb 15, 2024, 7:39:53 AM