Tight-binding theory of surface spin states on bismuth thin films
Tight-binding theory of surface spin states on bismuth thin films
复制标题
DOI：
10.1103/physrevb.93.041301
复制
发表时间：
2015-07
影响因子：
3.7
通讯作者：
Kazuo Saito;H. Sawahata;T. Komine;T. Aono
中科院分区：
文献类型：
--
作者：
Kazuo Saito;H. Sawahata;T. Komine;T. Aono
用紧束缚模型研究了铋薄膜的表面自旋态。该模型解释了用角度分辨光电子能谱进行的大部分实验观测，包括费米面、Rashba自旋分裂的能带结构以及表面态能隙中的量子限制。还会出现一个较大的离面自旋组件。表面态在薄膜内部穿透到布里渊区中心附近的大约几个双层内，而到达布里渊区边界附近的薄膜中心。
The surface spin states for bismuth thin films are investigated using an $s{p}^{3}$ tight-binding model. The model explains most experimental observations using angle-resolved photoemission spectroscopy, including the Fermi surface, the band structure with Rashba spin splitting, and the quantum confinement in the energy band gap of the surface states. A large out-of-plane spin component also appears. The surface states penetrate inside the film to within approximately a few bilayers near the Brillouin-zone center, whereas they reach the center of the film near the Brillouin-zone boundary.