Sterzi, A., Manzoni, G., Crepaldi, A., Cilento, F., Zacchigna, M., Leclerc, M., Bugnon, Ph., Magrez, A., Berger, H., Petaccia, L. and Parmigiani, F. (2018). Probing band parity inversion in the topological insulator GeBi2Te4 by linear dichroism in ARPES. J. Electron Spectrosc. Relat. Phenom., 225. S. 23 - 28. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1873-2526

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Abstract

Here we report on experiments performed by linear-dichroism angle resolved photoelectron spectroscopy (LD-ARPES) on septuple layers (SL) topological insulator GeBi2Te4. The linear dichroic signals, both for the valence band states and in the topologically protected surface state are interpreted as a probe of the symmetry of the states. The observation of a change in the LD-ARPES spectrum at the top of VB is attributed to the band parity inversion which is predicted by theory for all materials entering the topologically protected phase. Finally, the opening of a gap in the surface state dispersion along the non-high symmetry direction is reported. This is proposed to originated from the interaction between the surface state and the VB, leading to the formation of surface resonances. (C) 2018 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Sterzi, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Manzoni, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crepaldi, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cilento, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zacchigna, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leclerc, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bugnon, Ph.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Magrez, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berger, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petaccia, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parmigiani, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-187691
DOI: 10.1016/j.elspec.2018.03.004
Journal or Publication Title: J. Electron Spectrosc. Relat. Phenom.
Volume: 225
Page Range: S. 23 - 28
Date: 2018
Publisher: ELSEVIER SCIENCE BV
Place of Publication: AMSTERDAM
ISSN: 1873-2526
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SURFACE; BI2SE3; BI2TE3Multiple languages
SpectroscopyMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/18769

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