Layer-by-layer entangled spin-orbital texture of the topological surface state in Bi 2 Se 3
We study Bi2Se3 by polarization-dependent angle-resolved photoemission spectroscopy and density-functional theory slab calculations. We find that the surface state Dirac fermions are characterized by a layer-dependent entangled spin-orbital texture, which becomes apparent through quantum interferenc...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
21 May 2013
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| In: |
Physical review letters
Year: 2013, Jahrgang: 110, Heft: 21, Pages: 216401 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.110.216401 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.110.216401 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.110.216401 
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| Verfasserangaben: | Z.-H. Zhu, C.N. Veenstra, G. Levy, A. Ubaldini, P. Syers, N.P. Butch, J. Paglione, M.W. Haverkort, I.S. Elfimov, and A. Damascelli |
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| 245 | 1 | 0 | |a Layer-by-layer entangled spin-orbital texture of the topological surface state in Bi 2 Se 3 |c Z.-H. Zhu, C.N. Veenstra, G. Levy, A. Ubaldini, P. Syers, N.P. Butch, J. Paglione, M.W. Haverkort, I.S. Elfimov, and A. Damascelli |
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| 520 | |a We study Bi2Se3 by polarization-dependent angle-resolved photoemission spectroscopy and density-functional theory slab calculations. We find that the surface state Dirac fermions are characterized by a layer-dependent entangled spin-orbital texture, which becomes apparent through quantum interference effects. This explains the discrepancy between the spin polarization obtained in spin and angle-resolved photoemission spectroscopy—ranging from 20% to 85%—and the 100% value assumed in phenomenological models. It also suggests a way to probe the intrinsic spin texture of topological insulators, and to continuously manipulate the spin polarization of photoelectrons and photocurrents all the way from 0 to ±100% by an appropriate choice of photon energy, linear polarization, and angle of incidence. | ||
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