...
首页> 外文期刊>Physical review >Three-dimensional band structure of LaSb and CeSb: Absence of band inversion
【24h】

Three-dimensional band structure of LaSb and CeSb: Absence of band inversion

机译:LaSb和CeSb的三维能带结构:不存在能带反转

获取原文
获取原文并翻译 | 示例
           

摘要

We have performed angle-resolved photoemission spectroscopy (ARPES) of LaSb and CeSb, a candidate of topological insulators. Using soft-x-ray photons, we have accurately determined the three-dimensional bulk band structure and revealed that the band inversion at the Brillouin-zone corner, a prerequisite for realizing the topological-insulator phase, is absent in both LaSb and CeSb. Moreover, unlike the ARPES data obtained with soft-x-ray photons, those with VUV photons were found to suffer significant kz broadening. These results suggest that LaSb and CeSb are topologically trivial semimetals, and unusual Dirac-cone-like states observed with VUV photons are not of the topological origin.
机译:我们已经对LaSb和CeSb(一种拓扑绝缘体)进行了角度分辨光发射光谱(ARPES)。使用软X射线光子,我们已经精确地确定了三维体带结构,并揭示了在LaSb和CeSb中都不存在布里渊区角处的带反转,这是实现拓扑绝缘体相的前提。此外,与使用软X射线光子获得的ARPES数据不同,发现使用VUV光子的ARPES数据具有明显的kz展宽。这些结果表明,LaSb和CeSb在拓扑上是微不足道的半金属,并且用VUV光子观察到的异常的狄拉克锥状态并非拓扑起源。

著录项

  • 来源
    《Physical review》 |2017年第4期|041120.1-041120.5|共5页
  • 作者单位

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan;

    Centerfor Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan,Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan;

    Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan,Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan;

    Max-Planck-lnstitute for Solid State Research, Heisenbergstrsse 1, 70569 Stuttgart, Germany;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan,Centerfor Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

    Department ofPhysics, Tohoku University, Sendai 980-8578, Japan,Centerfor Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan;

  • 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