Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session A66: Structure, Growth, Stabilization and Function
8:00 AM–10:48 AM,
Monday, March 14, 2022
Room: Hyatt Regency Hotel -Grant Park D
Chair: Dave Mcllroy, Oklahoma State
Abstract: A66.00003 : Quantum Anomalous Hall effect in Cr-doped (Bi, Sb)2Te3 multilayer magnetic topological insulators.
8:24 AM–8:36 AM
Hee Taek Yi
Hee Taek Yi
Hee Taek Yi, Xiong Yao, Deepti Jain, Seongshik Oh
In this presentation, we investigate the QAHE with tuning Cr and Bi doping concentrations in multilayer magnetic TIs. As a platform, we employed a trilayer Cr-doped (Bi, Sb)2Te3 structure with heavy Cr doping at outer (top and bottom) layers. To increase the QAHE temperature, we systematically tune Bi and Cr concentrations in inner and outer MTI layers and, in a sample with optimized doping, observe close to the fully quantized value at 2 K without the external electric field for gating. We believe that this finding might be helpful for further study in high-temperature QAHE.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700