Giant out-of-plane spin component and the asymmetry of spin polarization in surface rashba states of bismuth thin film

Akari Takayama, T. Sato, S. Souma, T. Takahashi

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

We have performed high-resolution spin- and angle-resolved photoemission spectroscopy of bismuth thin film on Si(111) to investigate the spin structure of surface states. Unlike the conventional Rashba splitting, the magnitude of the in-plane spin polarization is asymmetric between the two elongated surface hole pockets across the zone center. Moreover, we uncovered a giant out-of-plane spin polarization as large as the in-plane counterpart which switches the sign across the Γ̄-M̄ line. We discuss the present finding in terms of the symmetry breaking and the many-body effects.

Original languageEnglish
Article number166401
JournalPhysical Review Letters
Volume106
Issue number16
DOIs
Publication statusPublished - 2011 Apr 19
Externally publishedYes

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bismuth
asymmetry
polarization
thin films
broken symmetry
photoelectric emission
switches
high resolution
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Giant out-of-plane spin component and the asymmetry of spin polarization in surface rashba states of bismuth thin film. / Takayama, Akari; Sato, T.; Souma, S.; Takahashi, T.

In: Physical Review Letters, Vol. 106, No. 16, 166401, 19.04.2011.

Research output: Contribution to journalArticle

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