| 报告题目： |
Tailoring Charge and Lattice in Nanoscale and Low Dimensional Electron Systems |
| 报告人： |
Xia Hong |
| 报告人单位： |
Department of Physics and Astronomy University of Nebraska-Lincoln |
| 报告时间： |
5月11日上午10：30 |
| 报告地点： |
科技楼北410 |
| 报告摘要： |
|
| |
The ability to control the charge and lattice degrees of freedom in nanoscale and low dimensional materials can often lead to new electronic and magnetic states and facilitate the rational design of novel functionalities for device applications. In this talk, I will discuss how we utilize the electric field effect and epitaxial strain to achieve such controls in two distinct classes of electronic systems, the two dimensional layered semiconductor MoS2, and the strongly correlated oxides (La,Sr)MnO3 and (Sm,Nd)NiO3.
In the first topic, I will describe our effort in achieving nonvolatile field effect modulation of MoS2 using a ferroelectric polymer as the top-gate, which can lead to programmable Schottky junction type devices when combined with the scanning probe approach. In the second topic, I’ll show how nanoscale periodic depth modulation can lead to a 50-fold enhancement of the magnetic anisotropy in ultrathin (La,Sr)MnO3, which has been attributed to a non-equilibrium strain distribution established due to the nanostructure engineering. I will also discuss the complex interplay among ferroelectric field effect, epitaxial strain, and interfacial charge transfer in determining the electronic properties of (Sm,Nd)NiO3 thin films. Our work highlights the rich opportunities in both fundamental studies and technological development of these hybrid and nanostructured material systems brought by nanoscale charge and lattice modulation. |
| 报告人简介： |
|
| |
Xia Hong received her B.S. degree from Peking University in 1998 and Ph.D. from Yale University in 2006. Between 2006 and 2010, she worked as a postdoctoral scholar at Pennsylvania State University. In 2011, she joined the Department of Physics and Astronomy at the University of Nebraska-Lincoln as an Assistant Professor. She received the National Science Foundation Career Award in 2012 and the Department of Energy Early Career Award in 2016. Her research focuses on the nanofabrication, magnetotransport and scanning probe studies of novel two dimensional electron systems, epitaxial oxide nanostructures and interfaces.
|
