Occuring monthly during the academic year, the 2DCC Webinars present new technical scientific news from within the 2DCC facility and the broader scientific community, as well as, broader topics such as science related to diversity. The webinars are free with an online registration. The slides with voice-over for the 2016 webinars, 2017 webinars, and 2018 webinars are available by following the links in the left menu. Information regarding the next scheduled webinar is listed below.
DATE: Tuesday, February 26, 2019
TIME: 12:00 pm - 1:00 pm Eastern
“Intrinsic Antiferromagnetic Topological Insulator MnBi2Te4 - Towards Realization of High-Temperature Quantum Anomalous Hall Insulator”
Dr. Seng Huat (Sam) lee
2DCC-MIP Postdoctoral Scholar in Bulk Crystal Growth, Penn State University
Quantum anomalous Hall (QAH) insulators hold great promise for applications in energy efficient electronics and quantum computation, since it supports spin-polarized dissipation-less chiral edge states. To date, the fully developed QAH state has only been realized in magnetically doped topological insulator (TI) [i.e. Cr/V doped (Bi,Sb)2Te3] films at a ‘critical temperature’ below ~ 1K, which severely constrains both the exploration of fundamental physics and meaningful technological applications based on this exotic phenomenon. Theory has shown that an intrinsic magnetic topological insulator MnBi2Te4 is an ideal platform to realize high-temperature QAH insulator and this prediction has attracted a great deal of interest. In this talk, I will discuss our studies on the spin scattering and non-collinear spin structure induced the intrinsic anomalous Hall effect probed in magnetotransport measurements.