Combined large spin splitting and one-dimensional confinement in surface alloys

Crepaldi, A.; Bihlmayer, G.; Kern, K.; Grioni, M.

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Combined large spin splitting and one-dimensional confinement in surface alloys

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Kern, K.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Crepaldi, A., Bihlmayer, G., Kern, K., & Grioni, M. (2013). Combined large spin splitting and one-dimensional confinement in surface alloys. New Journal of Physics, 15: 105013.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C5EB-B

Abstract

We have found and characterized, by angle-resolved photoelectron spectroscopy (ARPES), quasi-one-dimensional spin-split states in chain-like surface alloys formed by large Z elements (Bi and Pb) at the Cu(110) surface. The ARPES results are supported by first-principles relativistic calculations, which also confirm the spin polarization of these states, characteristic of the Rashba-Bychkov effect. The Fermi surface contours are open, but warped, as a result of the interaction with the bulk Cu conduction band. This interaction introduces a k dependence of the spin splitting perpendicular to the chains direction. We have also investigated the influence of the atomic spin-orbit parameter in substitutional isostructural Bi-1-Pb-x(x) overlayers, and found that the magnitude of the spin splitting can be continuously tuned as a function of stoichiometry.