Microscopic mechanism for the unusual antiferromagnetic order and the pressure-induced transition to ferromagnetism in USb2

Article

关键词: CYLINDRICAL FERMI SURFACES;    HEAVY-FERMION;    CRYSTAL-GROWTH;    SUPERCONDUCTIVITY;    SYSTEMS;    UGE2;    COEXISTENCE;    BEHAVIOR;    PHASES;    UASSE;   

DOI  :  10.1103/PhysRevB.97.041107

来源: SCIE

【 摘 要 】

Uranium diantimonide (USb2) reflects enigmatic properties posing a substantial challenge for a microscopic modeling. Among others, it develops a nonstandard antiferromagnetic order of a (up arrow down arrow down arrow up arrow)-type along the [001] crystallographic direction, and under pressure it undergoes a transition to the ferromagnetic phase. Here we propose a minimal low-energy model of USb2 which, as we demonstrate at the mean-field level, accommodates a physical mechanism for the mentioned observations. Relying on the obtained results we also comment on the features of magnetism observed in other U-based compounds: UAs2, UBi2, UAsSe, URhxIr1-xGe, and UGe2.

【 授权许可】

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