Spin-orbit splitting of the Shockley surface state on Cu(111)

A. Tamai, W. Meevasana, P. D. C. King, C. W. Nicholson, A. de la Torre, E. Rozbicki, and F. Baumberger
Phys. Rev. B 87, 075113 – Published 13 February 2013

Abstract

We present angle-resolved photoemission data from Cu(111). Using a focused 6 eV continuous-wave laser for photoexcitation, we achieve a high effective momentum resolution, enabling detection of the Rashba spin splitting in the Shockley surface state on Cu(111). The magnitude of the spin splitting of Δk0.006 Å1 is surprisingly large and exceeds values predicted for the analogous surface state on Ag(111), but is reproduced by first-principles calculations. We further resolve a kink in the dispersion, which we attribute to electron-phonon coupling.

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  • Received 8 November 2012

DOI:https://doi.org/10.1103/PhysRevB.87.075113

©2013 American Physical Society

Authors & Affiliations

A. Tamai*, W. Meevasana, P. D. C. King, C. W. Nicholson, A. de la Torre*, E. Rozbicki, and F. Baumberger*,§

  • SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife KY16 9SS, United Kingdom

  • *Present address: Département de Physique de la Matière Condensée, Université de Genève, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
  • Present address: School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand, and Thailand Center of Excellence in Physics, CHE, Bangkok 10400, Thailand.
  • Present address: Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA.
  • §Present address: Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.

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Issue

Vol. 87, Iss. 7 — 15 February 2013

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