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 d-wave singlet pairing with f-wave triplet pairing.
Competing instabilities of the extended Hubbard model on the triangular lattice: Truncated-unity functional renormalization group and application to moiré materials
BosonFlow: A C++ codebase for dynamic fRG and single-boson exchange in correlated fermion systems
Ruhr-University Bochum（波鸿鲁尔大学）；Max-Planck-Institut für Festkörperforschung（马克斯·普朗克固体研究所）；Vienna University of Technology（维也纳工业大学）；Universität Tübingen（蒂宾根大学）
Single-boson exchange formulation of the Schwinger-Dyson equation and its application to the functional renormalization group
Vienna University of Technology（维也纳工业大学）；Max Planck Institute for Solid State Research（马克斯·普朗克固体的研究所）；Arnold Sommerfeld Center for Theoretical Physics, Center for NanoScience, and Munich Center for Quantum Science and Technology, Ludwig-Maximilians-Universität München（慕尼黑大学）；Max Planck Institute of Quantum Optics（马克斯·普朗克量子光学研究所）；Universität Tübingen（蒂宾根大学）；Ruhr-University Bochum（波鸿鲁尔大学）；Harvard University（哈佛大学）
