首页> 中文期刊> 《中国物理快报:英文版》 >Evidence of Electron-Hole Imbalance in WTe2 from High-Resolution Angle-Resolved Photoemission Spectroscopy

Evidence of Electron-Hole Imbalance in WTe2 from High-Resolution Angle-Resolved Photoemission Spectroscopy

         

摘要

WTe2 has attracted a great deal of attention because it exhibits extremely large and non-saturating magnetoresistance.The underlying origin of such a giant magnetoresistance is still under debate.Utilizing laser-based angle-resolved photoemission spectroscopy with high energy and momentum resolutions,we reveal the complete electronic structure of WTe2.This makes it possible to determine accurately the electron and hole concentrations and their temperature dependence.We find that,with increasing the temperature,the overall electron concentration increases while the total hole concentration decreases.It indicates that the electron-hole compensation,if it exists,can only occur in a narrow temperature range,and in most of the temperature range there is an electron-hole imbalance.Our results are not consistent with the perfect electron-hole compensation picture that is commonly considered to be the cause of the unusual magnetoresistance in WTe2.We identify a fiat band near the Brillouin zone center that is close to the Fermi level and exhibits a pronounced temperature dependence.Such a flat band can play an important role in dictating the transport properties of WTe2.Our results provide new insight on understanding the origin of the unusual magnetoresistance in WTe2.

著录项

  • 来源
    《中国物理快报:英文版》 |2017年第9期|100-104|共5页
  • 作者单位

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Department of Physics and Engineering Physics, Tulane University, Louisiana 70118, USA;

    Department of Physics and Engineering Physics, Tulane University, Louisiana 70118, USA;

    Department of Physics and Engineering Physics, Tulane University, Louisiana 70118, USA;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    General Course Department, Military Transportation University, Tianjin 300161;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Collaborative Innovation Center of Quantum Matter, Beijing 100871;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

    Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190;

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190;

  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号