Journal Article

PreJuSER-3490

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Origin of the surface-state band-splitting in ultrathin Bi films: From a Rashba effect to a parity effect

Hirahara, T. ; Miyamoto, K. ; Kimura, A. ; Niinuma, Y. ; Bihlmayer, G.FZJ* ; Chulkov, E. V. ; Nagao, T. ; Matsuda, I. ; Qiao, S. ; Shimada, K. ; Namatame, H. ; Taniguchi, M. ; Hasegawa, S.

2008
Dt. Physikalische Ges. [Bad Honnef]

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Please use a persistent id in citations: http://hdl.handle.net/2128/28984  doi:10.1088/1367-2630/10/8/083038

Abstract: Following our previous work (Hirahara T et al 2007 Phys. Rev. B 76 153305), we have performed spin- and angle-resolved photoemission measurements at similar to 120K on ultrathin Bi films grown on a Si substrate, focusing on the split surface-state bands near the Fermi level. We found clear experimental evidence that these states show Rashba-type spin-split behavior near (Gamma) over bar, but the splitting is lost near (M) over bar M where they overlap with the bulk band projection. This can be explained as a change in the origin of the splitting from a Rashba effect to a parity effect as revealed by ab initio calculations.

Keyword(s): J

Note: We thank T Kadono, R Nishimura and K Kanomaru for their help during the measurements. This work has been supported by Grants-In-Aid from the Japanese Society for the Promotion of Science.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)
2. Quanten-Theorie der Materialien (IAS-1)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2008
Notes: Nachtrag

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