Role of Hund's splitting in electronic phase competition in Pb1-xSnxTe

Article

关键词: TOPOLOGICAL CRYSTALLINE INSULATOR;    UNCONVENTIONAL SUPERCONDUCTIVITY;    SCALING THEORY;    HUBBARD-MODEL;    ANTIFERROMAGNETISM;    SR2RUO4;   

DOI  :  10.1103/PhysRevB.96.205111

来源: SCIE

【 摘 要 】

We study the effect of Hund's splitting of repulsive interactions on electronic phase transitions in the multiorbital topological crystalline insulator Pb1-xSnx Te when the chemical potential is tuned to the vicinity of low-lying typeII Van Hove singularities. Nontrivial Berry phases associated with the Bloch states impart momentum dependence to electron interactions in the relevant band. We use a multipatch parquet renormalization-group (RG) analysis to study the competition of different electronic phases, and we find that if the dominant fixed-point interactions correspond to antiparallel spin configurations, then a chiral p-wave Fulde-Ferrell-Larkin-Ovchinnikov state is favored, otherwise none of the commonly encountered electronic instabilities occurs within the one-loop parquet RG approach.

【 授权许可】

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