| 报告题目 | Topological Structures of Novel Quantum System – Views from Scanning Microwave Impedance Microscope |
| 报告人 | Prof. Zhi-Xun Shen |
| 报告人单位 | Stanford University |
| 报告时间 | 2013-09-16 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心 |
| 报告介绍 | 报告摘要：
In this talk, we will report our progress in developing an AFM based, and scalable (batch processed tip) non-resonance microwave impedance microscope that achieves a resolution ~ 50 nm and reduces stray field coupling. The non-resonance approach and merge with the AFM platform also greatly reduce many of the “practical problems” that severely compromises advances of the earlier resonator based scanning microwave microscope, such as thermal drift, height control, and tip consistency – all critical for quantitative and repeatable measurements. We will show samples images from a range of materials – semiconductors, dielectrics, complex oxides, phase change memory materials, graphene, and topological insulators, also functional properties such as metal-insulator transition, semiconductor metrology, photoconductivity, imaging in water and bio-cells. The highlight of this talk will be the physics insight we gain by applying this technique to investigate topological structures of novel quantum systems, including edge state of topological order in QHE system, the percolation pathways in colossal magnetoresistive manganites and domain walls and vertex of ferroelectric and multi-ferro systems.
报告人简介：
Prof. Shen received his Ph.D. in Applied Physics from Stanford University in 1989, M.S. from Rutgers University in 1985, and B.S from Fudan University in 1983. Now he is the Paul Pigott Professor in Physical Sciences of Stanford University, the Chief Scientist of SLAC National Accelerator Laboratory, and Member and Vice Chair, Basic Energy Science Advisory Committee, DOE. He was the first Director of the Stanford Institute for Materials and Energy Sciences.Prof. Shen is a condensed matter physicist, with interest in materials and their applications. His work has been recognized by important awards, including the Kammerlingh Onne Prize (international prize on superconductivity, 2000); the E.O. Lawrence Award (US Department of Energy award on behalf of the President, 2009); and the Oliver E. Buckley Prize (condensed matter prize of the American Physical Society, 2011); Albert Einstein Professorship (Chinese Academy of Sciences, 2013). He has been a co-inventor of numerous patents, involving new energy, materials and sensors. |
