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A combined experimental and theoretical study of Rashba-split surface states on the ( √3x√3) Pb/Ag (111)R30° surface

Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-112786
  • We report on a combined low-temperature scanning tunneling spectroscopy (STS), angle-resolved photoemission spectroscopy (ARPES), and density functional theory (DFT) investigation of the ( √3x√3) Pb/Ag (111)R30° surface alloy which provides a giant Rashba-type spin splitting. With STS we observed spectroscopic features that are assigned to two hole-like Rashba-split bands in the unoccupied energy range. By means of STS and quantum interference mapping we determine the band onsets, splitting strengths, and dispersions for both bands. TheWe report on a combined low-temperature scanning tunneling spectroscopy (STS), angle-resolved photoemission spectroscopy (ARPES), and density functional theory (DFT) investigation of the ( √3x√3) Pb/Ag (111)R30° surface alloy which provides a giant Rashba-type spin splitting. With STS we observed spectroscopic features that are assigned to two hole-like Rashba-split bands in the unoccupied energy range. By means of STS and quantum interference mapping we determine the band onsets, splitting strengths, and dispersions for both bands. The unambiguous assignment of scattering vectors is achieved by comparison to ARPES measurements. While intra-band scattering is found for both Rashba bands, inter-band scattering is only observed in the occupied energy range. Spin- and orbitally-resolved band structures were obtained by DFT calculations. Considering the scattering between states of different spin- and orbital character, the apparent deviation between experimentally observed scattering events and the theoretically predicted spin polarization could be resolved.…zeige mehrzeige weniger

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Autor(en): Lydia El-Kareh, Gustav Bihlmayer, Arne Buchter, Hendrik Bentmann, Stefan Blügel, Friedrich Reinert, Matthias Bode
URN:urn:nbn:de:bvb:20-opus-112786
Dokumentart:Artikel / Aufsatz in einer Zeitschrift
Institute der Universität:Fakultät für Physik und Astronomie / Physikalisches Institut
Sprache der Veröffentlichung:Englisch
Erscheinungsjahr:2014
Originalveröffentlichung / Quelle:New Journal of Physics 16 (2014) 045017. doi:10.1088/1367-2630/16/4/045017
DOI:https://doi.org/doi:10.1088/1367-2630/16/4/045017
Allgemeine fachliche Zuordnung (DDC-Klassifikation):5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Freie Schlagwort(e):Rashba effect; angle resolved photo emission spectroscopy; density functional theory; scanning tunneling microscopy; spin–orbit coupling
Fachklassifikation Physik (PACS):60.00.00 CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES / 68.00.00 Surfaces and interfaces; thin films and nanosystems (structure and nonelectronic properties) (for surface and interface chemistry, see 82.65.+r, for surface magnetism, see 75.70.Rf) / 68.35.-p Solid surfaces and solid-solid interfaces: structure and energetics / 68.35.B- Structure of clean surfaces (and surface reconstruction)
60.00.00 CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES / 68.00.00 Surfaces and interfaces; thin films and nanosystems (structure and nonelectronic properties) (for surface and interface chemistry, see 82.65.+r, for surface magnetism, see 75.70.Rf) / 68.37.-d Microscopy of surfaces, interfaces, and thin films / 68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)
70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 71.00.00 Electronic structure of bulk materials (see section 73 for electronic structure of surfaces, interfaces, low-dimensional structures, and nanomaterials; for electronic structure of superconductors, see 74.25.Jb) / 71.15.-m Methods of electronic structure calculations (see also 31.15.-p Calculations and mathematical techniques in atomic and molecular physics) / 71.15.Mb Density functional theory, local density approximation, gradient and other corrections
70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 73.00.00 Electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures (for electronic structure and electrical properties of superconducting films and low-dimensional structures, see 74.78.-w; for computational / 73.20.-r Electron states at surfaces and interfaces / 73.20.At Surface states, band structure, electron density of states
70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES / 79.00.00 Electron and ion emission by liquids and solids; impact phenomena / 79.60.-i Photoemission and photoelectron spectra / 79.60.Bm Clean metal, semiconductor, and insulator surfaces
80.00.00 INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY / 81.00.00 Materials science / 81.65.-b Surface treatments (see also 85.40.-e Microelectronics: LSI, VLSI, ULSI; integrated circuit fabrication technology)
Datum der Freischaltung:12.05.2015
Sammlungen:Open-Access-Publikationsfonds / Förderzeitraum 2014
Lizenz (Deutsch):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung