Surface and bulk Fermiology and band dispersion in non-centrosymmetric BiTeI

Details Surface and bulk Fermiology and band dispersion in non-centrosymmetric BiTeI Surface and bulk Fermiology and band dispersion in non-centrosymmetric BiTeI

2012-04-10

arxiv.org/abs/1204.2196v1

Physics

Condensed Matter

Materials Science

10 pages, 4 figures, submitted to PRL

Scientific paper

BiTeI has a layered and non-centrosymmetric structure where strong spin-orbit interaction leads to a giant spin splitting in the bulk bands. Here we present high-resolution angle-resolved photoemission (ARPES) data in the UV and soft x-ray regime that clearly disentangle the surface from the bulk electronic structure. Spin-resolved UV-ARPES measurements on opposite, non-equivalent surfaces show identical spin structures, thus clarifying the surface state character. Soft x-ray ARPES data clearly reveal the spindle-torus shape of the bulk Fermi surface, induced by the spin-orbit interaction.

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