Unraveling the spin structure of unoccupied states in Bi2Se3
Unraveling the spin structure of unoccupied states in Bi2Se3
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揭示 Bi2Se3 中未占据态的自旋结构
DOI：
10.1103/physrevb.95.115401
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发表时间：
2017
影响因子：
3.7
通讯作者：
M. Donath
中科院分区：
文献类型：
--
作者：
Ch. Datzer;A. Zumbülte;J. Braun;T. Förster;A. B. Schmidt;B. Iverson;P. Hofmann;J. Minár;H. Ebert;P. Krüger;M. Rohlfing;M. Donath
拓扑表面态中自旋流的光学控制为（光）自旋电子学开辟了新的前景。为了理解这些过程，需要对占据和未占据电子态的色散和自旋极化有深刻的了解。我们提出了一个联合的实验和理论研究的拓扑绝缘体的未占电子态。我们讨论的自旋和角度分辨的逆光电发射的结果与计算的固有能带结构和（逆）光电发射的一步模型内，预期的光谱强度。这使我们能够解开的内在自旋纹理的未占用带的表面。
The optical control of spin currents in topological surface states opens new perspectives in (opto-) spintronics. To understand these processes, a profound knowledge about the dispersion and the spin polarization of both the occupied and the unoccupied electronic states is required. We present a joint experimental and theoretical study on the unoccupied electronic states of the topological insulator. We discuss spin- and angle-resolved inverse-photoemission results in comparison with calculations for both the intrinsic band structure and, within the one-step model of (inverse) photoemission, the expected spectral intensities. This allows us to unravel the intrinsic spin texture of the unoccupied bands at the surface of.