LaAlO_3/SrTiO_3界面导电性的近场成像（英文）  

Near-field imaging of the LaAlO_3/SrTiO_3 interfacial conductivity

作　　者：成龙 王冬利[1,2] 戴思远 严跃冬 范晓东 魏来明 曾长淦[1,2] 

机构地区：[1]中国科学技术大学合肥微尺度物质科学国家实验室,安徽合肥230026 [2]中国科学技术大学物理系中科院强耦合量子材料物理重点实验室,安徽合肥230026 [3]美国加州大学圣迭戈分校物理系,美国加州拉荷亚92093

出　　处：《红外与毫米波学报》2017年第5期534-537,共4页Journal of Infrared and Millimeter Waves

基　　金：Supported by National Basic Research Program of China(2014CB 921102);National Natural Science Foundation of China(11434009,11374279,11461161009);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(XDB01020000);the Fundamental Research Funds for the Central Universities(WK2030020027)

摘　　要：铝酸镧/钛酸锶(LaALO_3/SrTiO_3)异质界面被发现具有二维导电性并呈现出其他一些有趣的呈展现象.而此前,LaAlO_3/SrTiO_3异质界面的导电性主要都是通过电学方法进行表征.这里作者首次提出利用散射式扫描近场光学显微镜(s-SNOM)对LaAlO_3/SrTiO_3界面的导电性进行空间成像,这为研究过渡金属氧化物异质界面体系的物理现象提供了一个新的手段.The LaAlO3/SrTiO3 heterointerface has been discovered to showtwo-dimensional interfacial conductivity and other intriguing emergent phenomena. Its interfacial conductivity was mainly characterized by electric methods previously. Here the authors present for the first time that scattering-type scanning near-field optical microscopy（ sSNOM） can be employed to spatially image the conductivity of the buried LaAlO3/SrTiO3 interface,providing a newmeans to study the physics of transition metal oxide heterointerface systems.

关 键 词：过渡金属氧化物异质界面 铝酸镧/钛酸锶 界面导电性 散射式扫描近场光学显微镜 

分 类 号：O484.1[理学—固体物理] O484.41[理学—物理]