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Calendar: ALS Calendar
Title: ALS Special Seminar | Wenxin Tang
When: 04/ 4/2013 1:00 PM - 2:00 PM
Description: ALS Special Seminar

Thu, April 4, 2013
10-11am
15-253

Host:
Weishi Wan

Presented by:
Wen-Xin Tang
Monash University, Chongqing University

Title:
Real-time surface dynamics of GaAs by using in situ III-V low energy electron microscopy

Abstract:
Low energy electron microscopy (LEEM) is a powerful method for studying dynamics of surfaces, ultrathin films and nanostructures in situ with wide temperature range. These capabilities allow the study of structure, morphology and dynamic processes with excellent spatial and temporal resolution.

In this talk, Tang will introduce a unique III-V LEEM developed recently, and his studies on surface dynamics of GaAs (001). The Gallium droplet dynamics, surface dynamics and real-time nanostructure formation in real-time were captured by this technique for the first time. These discoveries facilitate the development of theories to understand better of quantum structure formation processes. It also allows the development of new strategies for improving semiconductor surface and quantum structures for future applications.

Biography: Dr. Tang obtained Ph.D. degree from Fudan University in 2003. He subsequently joined the Max Planck Institute of Microstructure Physics in Germany, where his research has involved studying spin dynamics in low dimensional system. He joined Monash University in 2007 and established the first III-V group low-energy electron microscopy system leading to new discoveries. In 2013, he joined Chongqing University as professor and focus on developing an ultrafast spin polarized LEEM and its applications in low-dimensional magnetic systems.
Location: 15-253-CR(80)
Author: areza@lbl.gov