Spin Splitting of an Au(111) Surface State Band Observed with Angle Resolved Photoelectron Spectroscopy

S. LaShell, B. A. McDougall, and E. Jensen
Phys. Rev. Lett. 77, 3419 – Published 14 October 1996
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Abstract

High momentum resolution angle resolved photoemission spectra from the Au(111) sp-derived surface state exhibit a doublet. The separation between the peaks increases linearly with k, and reaches a maximum of 110 meV at 0.1531, when one of the bands crosses the Fermi level. These results are interpreted as spin-split surface state bands, with the spins aligned in the plane of the surface perpendicular to the electronic momentum. The origin of the splitting is spin-orbit coupling, which can break spin degeneracy in systems which lack inversion symmetry.

  • Received 19 July 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.3419

©1996 American Physical Society

Authors & Affiliations

S. LaShell, B. A. McDougall, and E. Jensen

  • Physics Department, Brandeis University, Waltham, Massachusetts 02254

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Vol. 77, Iss. 16 — 14 October 1996

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