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Título: | Topology of spin polarization of the 5d states on W(110) and Al/W(110) surfaces |
Autor: | Rybkin, Artem G.; Krasovskii, E. E.; Marchenko, Dmitry; Chulkov, Eugene V. CSIC ORCID; Varykhalov, A. Yu.; Rader, Oliver; Shikin, Alexander M. | Fecha de publicación: | 2012 | Editor: | American Physical Society | Citación: | Physical Review B 86: 035117 (2012) | Resumen: | The spin polarization of W(110) and Al/W(110) surfaces is studied by spin- and angle-resolved photoemission. On both surfaces distinct E(k) dispersions are identified with an unusual topology: A single spectral branch is spin polarized antisymmetrically relative to the Γ̄ point, and two spin-polarized branches cross at Γ̄. The crossing branches disperse linearly but this similarity to a Dirac cone is lost after deposition of the Al, where they acquire a parabolic dispersion. Based on ab initio one-step photoemission theory, we show that the measured spin polarization is a property of the ground state and identify the effect as the counterpart of the recently discovered Rashba polarization of bulk states at the surface, but with a distinct non-Rashba topology. © 2012 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.86.035117 | URI: | http://hdl.handle.net/10261/102045 | DOI: | 10.1103/PhysRevB.86.035117 | Identificadores: | doi: 10.1103/PhysRevB.86.035117 issn: 1098-0121 e-issn: 1550-235X |
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Topology of spin.pdf | 1,11 MB | Adobe PDF | Visualizar/Abrir |
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