Spin-orbit influence on dz2-type surface state at Ta(110)
Spin-orbit influence on dz2-type surface state at Ta(110)
复制标题
自旋轨道对 Ta(110) dz2 型表面态的影响
DOI:
10.1103/physrevb.92.161408
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
M. Donath
中科院分区:
文献类型:
--
作者:
H. Wortelen;K. Miyamoto;H. Mirhosseini;T. Okuda;A. Kimura;D. Thonig;J. Henk;M. Donath
The influence of spin-orbit interaction on an occupied surface state at Ta(110) is investigated with spin- and angle-resolved photoemission and electronic structure calculations. The surface state appears in a symmetry gap at a binding energy of 0.45 eV atand exhibits a free-electron-likedispersion with an effective massof aboutalong. Photoemission results for excitation with- and-polarized light confirm the predicted-type symmetry of the state close to. Spin-resolved data for finitereveal a pure Rashba-type spin texture with a Rashba parameter of. These findings clearly prove a sizable impact of spin-orbit coupling on thesurface state and resolve a longstanding disagreement on this issue.