...
首页> 外文期刊>Physical review >Distinct surface and bulk charge density waves in ultrathin 1T-TaS_2
【24h】

Distinct surface and bulk charge density waves in ultrathin 1T-TaS_2

机译:超薄1T-TaS_2中不同的表面电荷和体电荷密度波

获取原文
获取原文并翻译 | 示例
           

摘要

We employ low-frequency Raman spectroscopy to study the nearly commensurate (NC) to commensurate (C) charge density wave (CDW) transition in 1T-TaS_2 ultrathin flakes protected from oxidation. We identify additional modes originating from C-phase CDW phonons that are distinct from those seen in bulk 1T-TaS_2. We attribute these to CDW modes from the surface layers. By monitoring individual modes with temperature, we find that surfaces undergo a separate, low-hysteresis NC-C phase transition that is decoupled from the transition in the bulk layers. This indicates the activation of a secondary phase nucleation process in the limit of weak interlayer interaction, which can be understood from energy considerations.
机译:我们采用低频拉曼光谱研究了1T-TaS_2超薄薄片中被氧化保护的几乎相当(NC)到相当(C)的电荷密度波(CDW)跃迁。我们确定了从C相CDW声子产生的其他模式,这些模式不同于在批量1T-TaS_2中看到的模式。我们将这些归因于表面层的CDW模式。通过监视温度的各个模式,我们发现表面经历了一个独立的低磁滞NC-C相变,该相变与体层中的相分离。这表明在弱的层间相互作用的限制下,第二相成核过程的激活,这可以从能量的角度来理解。

著录项

  • 来源
    《Physical review》 |2016年第20期|201108.1-201108.6|共6页
  • 作者单位

    Department of Physics, University of Northern Iowa, Cedar Falls, Iowa 50614, USA;

    Department of Physics, University of Hamburg, D-20355 Hamburg, Germany;

    Department of Physics, University of Northern Iowa, Cedar Falls, Iowa 50614, USA;

    Department of Physics, University of Northern Iowa, Cedar Falls, Iowa 50614, USA;

    Department of Physics, University of Northern Iowa, Cedar Falls, Iowa 50614, USA;

    Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China;

    Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China;

    Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China,High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China,Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China;

    Department of Physics, Columbia University, New York, New York 10027, USA;

    Institute for Quantum Computing and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1;

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

相似文献

  • 外文文献
  • 中文文献
  • 专利
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