α -Sn phase on Si(111): Spin texture of a two-dimensional Mott state

The α-Sn reconstruction on Si(111) is a prototype system for a two-dimensional Mott phase. In this study we performed spin-resolved photoemission experiments and analyzed in detail the spin structure of this electronically correlated surface state. The analysis of the spin-integrated bands as well a...

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Bibliographic Details
Published in:Physical review. B 2018-10, Vol.98 (16), p.165422, Article 165422
Main Authors: Jäger, M., Brand, C., Weber, A. P., Fanciulli, M., Dil, J. H., Pfnür, H., Tegenkamp, C.
Format: Article
Language:English
Subjects:
Antiferromagnetism
Correlation analysis
Crystallography
Domains
Electron spin
Photoelectric emission
Reconstruction
Silicon
Spin structure
Surface layers
Texture
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Summary:The α-Sn reconstruction on Si(111) is a prototype system for a two-dimensional Mott phase. In this study we performed spin-resolved photoemission experiments and analyzed in detail the spin structure of this electronically correlated surface state. The analysis of the spin-integrated bands as well as the spin texture of the surface states along different crystallographic directions provide clear evidence for the formation of collinear antiferromagnetic (23×3) domains, while the Sn reconstruction reveals a (3×3) symmetry. The Rashba splitting of the highest occupied Mott state was found to be Δk=0.05Å−1, i.e., the α-Sn phase should be termed a weakly spin-orbit coupled Mott system.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.98.165422