低维材料中的电荷密度波  

Charge density waves in low-dimensional material

作　　者：樊金泽 方展伯 罗超杰 张汇[1,2] Fan Jin-Ze;Fang Zhan-Bo;Luo Chao-Jie;Zhang Hui(Hefei National Laboratory for Physical Sciences at Microscale,University of Science and Technology of China,Hefei 230026,China;Department of Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]合肥微尺度物质科学国家研究中心,中国科学技术大学,合肥230026 [2]中国科学技术大学物理学院,合肥230026

出　　处：《物理学报》2022年第12期133-155,共23页Acta Physica Sinica

基　　金：国家重点研发计划(批准号:2017YFA0205004);国家自然科学基金(批准号:11804324,12074357)资助的课题。

摘　　要：电荷密度波(charge density wave, CDW)是低维体系中存在的一种重要的物理现象,对CDW的研究有助于人们对低维系统中内禀电声子耦合和关联等相互作用有更深层次的认识,同时通过对材料中CDW的精准调控可以有效控制低维材料中磁性、超导等物理性质. CDW的研究最早起源于一维和准一维材料,本文首先简要介绍了CDW的一些基本性质和一维体系中CDW的一些研究.而近些年的研究发现CDW在很多二维材料中普遍存在.本文将着重介绍二维材料中CDW的最新研究进展.通过介绍二维材料中CDW的基本物性和产生机理,讨论CDW与Mott相、超导序和其他序(自旋密度波、配对密度波)之间的相互作用;探讨CDW中存在的多电子集体激发和手性性质;介绍掺杂、高压和激光脉冲等手段对CDW的调控;最后展望相关领域中可能的研究方向.Charge density waves(CDWs) have triggered off extensive research in low-dimensional systems. The discovery of CDW offers a new crucial clue to understanding the intrinsic mechanisms of low-dimensional electron-phonon coupling and electron correlation. In addition, the physical properties of low-dimensional material such as magnetism and superconductivity can be fine-tuned with accurately and effectively controlled CDW phase. At the beginning,we briefly introduce the basic properties of CDW in one-dimensional and quasi one-dimensional materials, revealing the physical proprieties of the CDW, for instance, the excited state and the manipulation technologies. Then, focusing on the CDW in a two-dimensional system, we mainly introduce the recent research progress and the generation mechanism of CDW of two-dimensional materials. The interaction between CDW and Mott insulator and between superconductivity and other orders such as spin density wave and pair density wave provide a new perspective to research the multi-electron collective excitation and electron interaction. The manipulation of multi-electron collective excitation and electron-phonon interaction in CDW through doping, high pressure and laser pulse is also introduced and shares similarity with the one-dimensional system. Finally, in this article we propose a potential research application of two dimensional CDW.

关 键 词：电荷密度波 低维系统 超导 

分 类 号：TB34[一般工业技术—材料科学与工程]