Fermi surface and anisotropic spin-orbit coupling of sb(111) studied by angle-resolved photoemission spectroscopy
Fermi surface and anisotropic spin-orbit coupling of sb(111) studied by angle-resolved photoemission spectroscopy
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DOI：
10.1103/physrevlett.96.046411
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发表时间：
2006-02-03
影响因子：
8.6
通讯作者：
Sasaki, T
中科院分区：
文献类型：
--
作者：
Sugawara, K;Sato, T;Sasaki, T
对Sb（111）进行了高分辨率角分辨光发射光谱分析，以阐明v族半金属表面异常电子性质的来源。发现表面是金属的，尽管有半金属的体积特征。我们清楚地观察到两个表面衍生的费米表面可能是自旋分裂的，表明自旋轨道相互作用在表征v族半金属的表面电子态中起主导作用。从颗粒超导性、电子-声子耦合、表面电荷或自旋密度波等方面讨论了铋和锑中电子结构的普遍性或差异性。
High-resolution angle-resolved photoemission spectroscopy has been performed on Sb(111) to elucidate the origin of anomalous electronic properties in group-V semimetal surfaces. The surface was found to be metallic despite the semimetallic character of bulk. We clearly observed two surface-derived Fermi surfaces which are likely spin split, demonstrating that the spin-orbit interaction plays a dominant role in characterizing the surface electronic states of group-V semimetals. The universality or dissimilarity of the electronic structure in Bi and Sb is discussed in relation to the granular superconductivity, electron-phonon coupling, and surface charge or spin density wave.