Speaker: Prof. Yusheng HOU from Sun Yat-Sen University
Title: Computational Study of Magnetic Damping in Heterostructures
Time: 10:00 July 28th, 2025 (Monday)
Venue: No.4 conference room on the 3rd floor, Building No.5
Host: Prof. Jin Zhang
Info. of Speaker：
Yusheng Hou, an associate professor (via the "Hundred Talents Program") and doctoral supervisor at Sun Yat-Sen University. He obtained his Bachelor's degree in Physics from Hunan Normal University in June 2011 and subsequently joined the Department of Physics at Fudan University in September of the same year. Under the supervision of Academician Xin-Gao Gong, he pursued a Ph.D. in Theoretical Physics, conducting first-principles computational research on the magnetic properties of transition metal oxides. From September 2016 to October 2020, he conducted postdoctoral research at the University of California, Irvine, working with Prof. Ruqian Wu, a renowned expert in computational condensed matter physics. In November 2020, he joined the School of Physics at Sun Yat-sen University as a "Hundred Talents Program" faculty member. He has presided over projects including the National Natural Science Foundation of China (NSFC) General Program and Youth Science Fund, and has participated in key national research initiatives such as the National Key R&D Program and the NSFC Major Research Plan. His primary research focus is computational condensed matter physics, with recent work centered on magnetic topological insulators and two-dimensional magnetism. To date, he has published 65 SCI-indexed papers with a total citation count exceeding 2000 and an h-index of 25 (Google Scholar). His research has been published in prestigious international journals, including: Physical Review Letters, Science Advances, Advanced Science, Nano Letters, Advanced Functional Materials, npj Computational Materials, Physical Review B.
Abstract：
The magnetic damping factor is a crucial physical parameter that determines key magnetic properties, including: Magnetization switching time in ferromagnetic systems, spin wave propagation length, as well as domain wall and magnetic skyrmion motion speeds. As such, it plays a pivotal role in governing the performance of spintronic devices, making the effective control of magnetic damping essential for optimizing device functionality.
In this presentation, we will first introduce fundamental physics of magnetic damping, and first-principles computational methods for calculating magnetic damping. Building upon this foundation, we will investigate the physical mechanisms underlying the modulation of magnetic damping in magnetic heterostructures, including topological surface states in thin-film topological insulators and two-dimensional ferroelectric polarization, as well as fermi surface effects of Rashba states in Rashba ferroelectric systems. Furthermore, we will demonstrate how band engineering in magnetic heterostructures enables anisotropic and thickness-dependent anisotropicmagnetic damping. Our findings reveal that the observed anisotropic magnetic damping in these heterostructures is intrinsically linked to their anisotropic electronic band structures.
