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

Alberto Crepaldi; Gustav Bihlmayer; Klaus Kern; Marco Grioni

doi:10.1088/1367-2630/15/10/105013

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

Mesoscale and Nanoscale Physics 2015-06-17 v1

Authors: Alberto Crepaldi , Gustav Bihlmayer , Klaus Kern , Marco Grioni

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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-x}Pb_{x} overlayers, and found that the magnitude of the spin splitting can be continuously tuned as a function of stoichiometry.

Keywords

angle-resolved photoemission spectroscopy rashba spin-orbit coupling fermi surface

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@article{arxiv.1310.4277,
  title  = {Combined large spin-splitting and one dimensional confinement in surface alloys},
  author = {Alberto Crepaldi and Gustav Bihlmayer and Klaus Kern and Marco Grioni},
  journal= {arXiv preprint arXiv:1310.4277},
  year   = {2015}
}

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8 pages, 4 figures

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

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