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Direct measurement of the bulk spin structure of noncentrosymmetric BiTeCl

机译:直接测量非中心对称BiTeCl的本体自旋结构

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摘要

A strong spin-orbit interaction leads to a Rashba-type splitting of the bulk bands of BiTeCl, which results in toroidal Fermi surfaces with distinct spin structures depending on the chemical potential. Here, we present spin-and angle-resolved photoelectron spectroscopy measurements of the three-dimensional spin-orbit split state at the top of the valence band. Its polarization is systematically studied in dependence of the photon energy and compared to ab initio calculations of the initial state. The measured spin orientation is in plane to the (0001) surface and perpendicular to the momentum, independently of the photon energy.
机译:强烈的自旋轨道相互作用导致BiTeCl主体带的Rashba型分裂,这取决于化学势导致具有不同自旋结构的环形费米表面。在这里,我们介绍在价带顶部的三维自旋轨道分裂态的自旋和角度分辨光电子能谱测量。根据光子能量系统地研究了其极化,并与初始状态的从头算起进行了比较。所测得的自旋取向与(0001)表面成平面且与动量垂直,而与光子能量无关。

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  • 来源
    《Physical review》 |2015年第8期|081201.1-081201.6|共6页
  • 作者单位

    Physik-Institut, Universitaet Zuerich, Winterthurerstrasse 190, CH-8057 Zuerich, Switzerland,Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland;

    Institute of Strength Physics and Materials Science, Russian Academy of Sciences, Siberian Branch, Akademicheskiy prospekt 2/4, Tomsk 634021, Russia,Tomsk State University, Tomsk 634050, Russia,Saint Petersburg State University, Saint Petersburg 198504, Russia;

    Saint Petersburg State University, Saint Petersburg 198504, Russia,Rzhanov Institute of Semiconductor Physics, Russian Academy of Sciences, Siberian Branch, prospekt Akademika Lavrenteva 13, Novosibirsk 630090, Russia,Novosibirsk State University, Novosibirsk 636090, Russia;

    Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland,Institut de Physique de la Matiere Condensee, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

    Saint Petersburg State University, Saint Petersburg 198504, Russia,Novosibirsk State University, Novosibirsk 636090, Russia,Sobolev Institute of Geology and Mineralogy, Russian Academy of Sciences, Siberian Branch, prospekt Koptyuga 3, Novosibirsk 630090, Russia;

    Physik-Institut, Universitaet Zuerich, Winterthurerstrasse 190, CH-8057 Zuerich, Switzerland;

    Donostia International Physics Center (DIPC) and CFM-MPC, Centra Mixto CSIC-UPV/EHU, Departamento de Fisica de Materiales, UPV/EHU, E-20080 San Sebastian, Spain;

    Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland,Institut de Physique de la Matiere Condensee, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

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  • 正文语种 eng
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  • 关键词

    clean metal, semiconductor, and insulator surfaces; semiconductor compounds; spin-orbit coupling, zeeman and stark splitting, jahn-teller effect;

    机译:清洁金属;半导体和绝缘体表面;半导体化合物自旋轨道耦合;塞曼和斯塔克分裂;詹-泰勒效应;

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