来源：Institute of LQM 作者：Heyang Li 发布：2026-09-09 点击量：
About the Speaker
Dr. Yang Huai is affiliated with Hubei University of Technology, Wuhan, China. He received his Ph.D. in Condensed Matter Physics from the Institute of Semiconductors, Chinese Academy of Sciences. He has extensive research experience in low-dimensional semiconductor and functional materials. His research focuses on two-dimensional and quasi-one-dimensional materials, crystal growth, anisotropic light-matter interactions, ferroic and magnetic materials, van der Waals heterostructures and optoelectronic devices. His work integrates crystal synthesis, structural and spectroscopic characterization, electrical and photoelectrical measurements, and first-principles calculations to establish structure-property -device relationships. He has published research in journals including ACS Nano, Advanced Functional Materials, Physical Review B, Advanced Science, Advanced OpticalMaterials, and Journal of Materials Chemistry C.
Seminar Details
Title: Giant In-Plane Anisotropy in 2D semiconductor: From Crystal Structure to Polarization-Sensitive Photodetection
Date: September 11, 2026
Time: 2:30 PM
Venue: 1st Floor, Seminar Room, Building B, Innovation and Entrepreneurship Center, HBUT
Abstract
Low-symmetry two-dimensional materials provide an attractive platform for manipulating anisotropic light-matter interactions, yet the microscopic structural origin of strong in-plane anisotropy remains an important question. In this work, we investigate two-dimensional AuPS as an anisotropic semiconductor in which mixed local coordination and stereoscopic lattice distortion generate strongly inequivalent in-plane structural and electronic environments. Structural characterization, polarization-resolved Raman spectroscopy, electrical transport measurements, and first-principles calculations are combined to establish the relationship between crystal structure and anisotropic physical properties. The mixed-coordination framework produces pronounced direction-dependent lattice vibrations, electronic dispersion, carrier transport, andoptical response. These structural and electronic characteristics result in a large in-plane electrical anisotropy and a strongly polarization-dependent photoresponse. AuPS-based photodetectors consequently exhibit clear modulation of photocurrent with the polarization direction of incident light, demonstrating its potential for polarization-sensitive optoelectronic detection. This presentation will focus on how mixed coordination and stereoscopic structural distortion can serveas a microscopic origin of giant in-plane anisotropy in AuPS. The results illustrate a crystal-chemical strategy for understanding and designing anisotropic electronic and optical properties inow-dimensional semiconductors, and provide insights into the development of polarization-sensitive photodetectors and other direction-dependent optoelectronic devices.
Who Should Attend
Whether you are an undergraduate student, graduate student, postdoctor, faculty member, or simply someone fascinated by 2D materials, spintronics, or quantum physics — this seminar is for you. No prior expertise is required.
All backgrounds welcome
Open to everyone interested in research
Opportunity to ask questions and discuss science
Come curious, leave inspired. All are welcome!
