Journal article
Rashba spin-orbit coupling in the Kane-Mele-Hubbard model
M Laubach, J Reuther, R Thomale, S Rachel
Physical Review B Condensed Matter and Materials Physics | AMER PHYSICAL SOC | Published : 2014
Abstract
Spin-orbit (SO) coupling is the crucial parameter to drive topological-insulating phases in electronic band models. In particular, the generic emergence of SO coupling involves the Rashba term which fully breaks the SU(2) spin symmetry. As soon as interactions are taken into account, however, many theoretical studies have to content themselves with the analysis of a simplified U(1)-conserving SO term without Rashba coupling. We intend to fill this gap by studying the Kane-Mele-Hubbard (KMH) model in the presence of Rashba SO coupling and present the first systematic analysis of the effect of Rashba SO coupling in a correlated two-dimensional topological insulator. We apply the variational cl..
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Awarded by European Commission
Funding Acknowledgements
The authors acknowledge discussions with Karyn Le Hur, Martin Hohenadler, Fakher F. Assaad, Andreas Ruegg, Motohiko Ezawa, Tobias Meng, Michael Sing, Jorg Schafer, and Matthias Vojta. We thank the LRZ Munich and ZIH Dresden for generous allocation of CPU time. M.L. is supported by the DFG through FOR 1162. J.R. acknowledges support by the Deutsche Akademie der Naturforscher Leopoldina through grant LPDS 2011-14. R.T. is supported by the ERC starting grant TOPOLECTRICS of the European Research Council (ERC-StG-2013-336012). S.R. is supported by the DFG through FOR 960, the DFG priority program SPP 1666 "Topological Insulators," and by the Helmholtz Association through VI-521. We thank the Center for Information Services and High Performance Computing (ZIH) at TU Dresden for generous allocations of computer time.