Spin-orbit and anisotropy effects in unoccupied bulk, surface, and image-potential states on W(110)

Henry Wortelen, Jürgen Henk, and Markus Donath

Phys. Rev. B 95, 085416 – Published 9 February 2017

Abstract

We report on joint experimental and theoretical investigations of the unoccupied surface electronic structure of W(110). The spin-resolved inverse-photoemission experiments reveal a number of bands influenced by spin-orbit interaction and an image-potential state. The bands disperse differently within the two nonequivalent mirror planes of the surface, which is explained by their origin and their localization within the surface region. Surprisingly, the image-potential state also exhibits anisotropic dispersion, although it is strongly located within the surface barrier. The experimental findings are confirmed by first-principles electronic-structure calculations.

Received 10 January 2017
Revised 24 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.085416

Physics Subject Headings (PhySH)

Electronic structure Rashba coupling Spin-orbit coupling Surface states

Elemental materials Single crystal materials Surfaces

Band structure methods Photoemission spectroscopy

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Henry Wortelen^1,*, Jürgen Henk², and Markus Donath¹

¹Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany
²Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle (Saale), Germany

^*Corresponding author: henry.wortelen@uni-muenster.de

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Issue

Vol. 95, Iss. 8 — 15 February 2017

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