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题名: Topologically Entangled Rashba-Split Shockley States on the Surface of Grey Arsenic
作者: Zhang, Peng;  Ma, J-Z;  Ishida, Y.;  Zhao, L-X;  Xu, Q-N;  Lv, B-Q;  Yaji, K.;  Chen, G-F;  Weng, H-M;  Dai, X.;  Fang, Z.;  Chen, X-Q;  Fu, L.;  Qian, T.;  Ding, H.;  Shin, S.
发表日期: 2017-1-27
摘要: We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angleresolved photoemission spectroscopy (ARPES). In the occupied side, the pair resembles typical nearlyfree- electron Shockley states observed on noble-metal surfaces. However, pump-probe ARPES reveals that the spin-polarized pair traverses the bulk band gap and that the crossing of the pair at (Gamma) over bar G is topologically unavoidable. First-principles calculations well reproduce the bands and their nontrivial topology; the calculations also support that the surface states are of Shockley type because they arise from a band inversion caused by crystal field. The results provide compelling evidence that topological Shockley states are realized on As(111).
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Zhang, Peng,Ma, J-Z,Ishida, Y.,et al. Topologically Entangled Rashba-split Shockley States On The Surface Of Grey Arsenic[J]. Physical Review Letters,2017,118(4):-.

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