Journal article
Rashba spin-orbit coupling in the square-lattice Hubbard model: A truncated-unity functional renormalization group study
J Beyer, JB Hauck, L Klebl, T Schwemmer, DM Kennes, R Thomale, C Honerkamp, S Rachel
Physical Review B | AMER PHYSICAL SOC | Published : 2023
Abstract
The Rashba-Hubbard model on the square lattice is the paradigmatic case for studying the effect of spin-orbit coupling, which breaks spin and inversion symmetry, in a correlated electron system. We employ a truncated-unity variant of the functional renormalization group which allows us to analyze magnetic and superconducting instabilities on equal footing. We derive phase diagrams depending on the strengths of Rasbha spin-orbit coupling, real second-neighbor hopping, and electron filling. We find commensurate and incommensurate magnetic phases which compete with d-wave superconductivity. Due to the breaking of inversion symmetry, singlet and triplet components mix; we quantify the mixing of ..
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Awarded by Australian Research Council
Funding Acknowledgements
The German Research Foundation (DFG) is acknowledged for support through Grant No. RTG 1995, within the Priority Program SPP 2244 "2DMP" and under Germany's Excellence Strategy-Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) Grant No. EXC20004/1-390534769.R.T. acknowledges support from the DFG through QUAST for Grant No. 5249-449872909 (Project P3), through Project-ID 258499086-SFB 1170, and from the Wuerzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter ct.qmat Project-ID 390858490-EXC 2147. S.R. acknowledges support from the Australian Research Council (Grants No. FT180100211 and No. DP200101118). The authors gratefully acknowledge the scientific support and HPC resources provided by the Erlangen National High Performance Computing Center (NHR@FAU) of the Friedrich-Alexander-Universitaet Erlangen-Nuernberg (FAU) during the NHR@FAU early access phase. NHR funding is provided by federal and Bavarian state authorities. NHR@FAU hardwareis partially funded by the DFG 440719683. T.S. acknowledges the hospitality by the School of Physics of the University of Melbourne, where part of the work has been done