Experimental evidence for spin-split bands in a one-dimensional chain structure
Experimental evidence for spin-split bands in a one-dimensional chain structure
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DOI：
10.1103/physrevlett.97.226405
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发表时间：
2006-12-01
影响因子：
8.6
通讯作者：
Himpsel, F. J.
中科院分区：
文献类型：
--
作者：
Barke, I.;Zheng, Fan;Himpsel, F. J.
相邻Si（111）表面上的金原子链表现出一种不寻常的半填充带的双重结构，其起源仍不确定。这种分裂被角分辨光发射识别为自旋轨道相互作用（Rashba效应）引起的自旋分裂，与Sanchez-Portal、Riikonen和Martin的理论预测一致。这种相互作用导致了在超晶格带边界处避免带交叉的特征模式。避免了四个交叉中的两个，最小E-G=85 meV， k偏移为0.05 a（-1）。
Gold atom chains on vicinal Si(111) surfaces exhibit an unusual doublet of half-filled bands, whose origin has remained uncertain. The splitting is identified by angle-resolved photoemission as a spin splitting induced by the spin-orbit interaction (Rashba effect), in agreement with a theoretical prediction by Sanchez-Portal, Riikonen, and Martin. This interaction leads to a characteristic pattern of avoided band crossings at a superlattice zone boundary. Two out of four crossings are avoided, with a minigap E-G=85 meV and a k offset of 0.05 A(-1).