Anisotropic spin gaps in BiAg$_2$-Ag/Si(111)

Alberto Crepaldi; Stephane Pons; Emmanouil Frantzeskakis; Klaus Kern; Marco Grioni

doi:10.1103/PhysRevB.85.075411

Anisotropic spin gaps in BiAg$_2$-Ag/Si(111)

Materials Science 2015-06-03 v3 Other Condensed Matter

Authors: Alberto Crepaldi , Stephane Pons , Emmanouil Frantzeskakis , Klaus Kern , Marco Grioni

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Abstract

We present a detailed analysis of the band structure of the BiAg $_2$ /Ag/Si(111) trilayer system by means of high resolution Angle Resolved Photoemission Spectroscopy (ARPES). BiAg2/Ag/Si(111) exhibits a complex spin polarized electronic structure due to giant spin-orbit interactions. We show that a complete set of constant energy ARPES maps, supplemented by a modified nearly free electron calculation, provides a unique insight into the structure of the spin polarized bands and spin gaps. We also show that the complex gap structure can be continuously tuned in energy by a controlled deposition of an alkali metal.

Keywords

BiAg2/Ag/Si(111) spin gaps ARPES spin-orbit interactions band structure alkali metal deposition

Cite

@article{arxiv.1112.3275,
  title  = {Anisotropic spin gaps in BiAg$_2$-Ag/Si(111)},
  author = {Alberto Crepaldi and Stephane Pons and Emmanouil Frantzeskakis and Klaus Kern and Marco Grioni},
  journal= {arXiv preprint arXiv:1112.3275},
  year   = {2015}
}

Comments

6 pages, 5 figures

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