二维Janus原子晶体的电子性质  

Electronic properties of two-dimensional Janus atomic crystal

作　　者：王盼 宗易昕 文宏玉 夏建白[1,2] 魏钟鸣 Wang Pan;Zong Yi-Xin;Wen Hong-Yu;Xia Jian-Bai;Wei Zhong-Ming(State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院半导体研究所,半导体超晶格国家重点实验室,北京100083 [2]中国科学院大学,材料与光电研究中心,北京100049

出　　处：《物理学报》2021年第2期104-120,共17页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2018YFB2200501);国家自然科学基金(批准号:11904360)资助的课题.

摘　　要：自从石墨烯问世以来,具有各种新奇特性的二维材料在光电设备、自旋电子器件和谷电子器件等领域受到越来越多的关注.其中,使用各种分子基团对石墨烯进行不对称官能化时出现的优异性质,引发了人们对其他具有不对称表面特性的Janus二维材料的研究.作为二维材料的重要衍生物,Janus二维材料(尤其是Janus过渡金属硫化物)已成为近年来的研究热点.实验和理论上均已证实这类材料由于具有镜面不对称性而拥有新颖的特性,例如强的Rashba效应和平面外压电极化,为其在传感器、制动器和其他机电设备中的应用提供了广阔的前景.本文综述了新兴的Janus二维材料(包括Janus石墨烯,各种Janus二维材料以及Janus二维范德瓦耳斯异质结)的最新研究进展,总结了Janus二维材料独特的电子性质和潜在的应用.最后,给出了对Janus二维材料进行下一步探索的结论和展望.Since the advent of graphene,two-dimensional materials with various novel properties have received more and more attention in the fields of optoelectronic devices,spintronics and valley electronic devices.Among them,the excellent properties that appear in graphene with various molecular groups for asymmetric functionalization have led to the research of other Janus two-dimensional materials with asymmetric surface characteristics.As an important derivative of two-dimensional materials,Janus two-dimensional materials(especially Janus transition metal chalcogenides)have become a research hotspot in recent years.Both experiment and theory have confirmed that this kind of material has mirror asymmetry and novel characteristics,such as strong Rashba effect and out-of-plane piezoelectric polarization,and thus showing a great prospect for its applications in sensors,actuators,and other electromechanical devices.In this review we introduce the recent research progress of emerging Janus two-dimensional materials(including Janus graphene,various Janus two-dimensional materials and Janus two-dimensional van der Waals heterojunction),and summarize the unique electronic properties and potential applications of Janus two-dimensional materials.Finally,we draw some conclusions and depict a prospect of further exploration of Janus two-dimensional materials.

关 键 词：Janus原子晶体 电子性质 Rashba效应 压电效应 

分 类 号：TB34[一般工业技术—材料科学与工程]