A metallic surface state with uniaxial spin polarization on Tl/Ge(111)-(1 × 1)
A metallic surface state with uniaxial spin polarization on Tl/Ge(111)-(1 × 1)
复制标题
Tl/Ge(111)-(1 × 1) 上单轴自旋极化的金属表面态
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Aruga
中科院分区：
文献类型：
--
作者：
Y. Ohtsubo;S. Hatta;H. Okuyama;T. Aruga
我们发现在Tl/Ge（111）-（1 × 1）上形成了金属表面态。表面态在表面布里渊区周围形成电子袋。第一性原理计算表明，电子袋是由一个单一的分支的自旋分裂表面态带。自旋量子化轴沿着表面法线，并根据时间反演对称性反转。由于该自旋分裂分支是该表面上唯一的金属带，因此表面电导率应该由该自旋分裂分支控制，这表明可能存在自旋极化电流。
We show that a metallic surface state is formed on Tl/Ge(111)-(1 × 1). The surface state forms electron pockets around of the surface Brillouin zone. A first-principles calculation reveals that the electron pockets are composed of a single branch of a spin-split surface-state band. The spin quantization axis is along the surface normal and inverts according to the time-reversal symmetry. Since this spin-split branch is the unique metallic band on this surface, the surface conductivity should be governed by this spin-split branch, suggesting a possible spin-polarized electric current.