Spin-polarized surface states on Br/Ge (111)-(1x1) : Surface Spin polarization without heavy elements
Spin-polarized surface states on Br/Ge (111)-(1x1) : Surface Spin polarization without heavy elements
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Br/Ge (111)-(1x1) 上的自旋极化表面态：无重元素的表面自旋极化
DOI：
10.1103/physrevb.86.165325
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Y. Ohtsubo;et al.
我们研究了Br/Ge(111)-(11)表面的原子和电子结构。角分辨光电子能谱法（ARPES）在最大体价带附近发现了一对表面带。自旋分辨ARPES （SARPES）实验表明，这些表面带是自旋极化的。基于低能电子衍射测定原子结构的第一性原理计算结果与ARPES和SARPES结果吻合较好。目前的结果清楚地表明，由于Rashba自旋轨道相互作用，表面电子态的显著自旋极化可以在不属于元素周期表第五行或更高行重元素的情况下获得。
We have investigated the atomic and electronic structure of the Br/Ge(111)-(11) surface. A couple of surface bands were found near the bulk valence band maximum by angle-resolved photoelectron spectroscopy (ARPES). Spin-resolved ARPES (SARPES) experiments showed that these surface bands are spin polarized. The results of the first-principles calculation based on the atomic structure determined by low-energy electron diffraction are in good agreement with the ARPES and SARPES results. The present result clearly shows that the significant spin polarization of the surface electronic states due to the Rashba spin-orbit interaction can be obtained without heavy elements belonging to the fifth or higher rows of the periodic table.