Nonsymmorphic Weyl superconductivity in UPt3 based on E-2u representation

Article

关键词: ORDER-PARAMETER;    UNCONVENTIONAL SUPERCONDUCTIVITY;    TOPOLOGICAL INSULATORS;    THERMAL-CONDUCTIVITY;    HALL CONDUCTANCE;    GAP STRUCTURE;    SPIN HALL;    PHASES;    FLUCTUATIONS;    TRANSITION;   

DOI  :  10.1103/PhysRevB.94.174502

来源: SCIE

【 摘 要 】

We show that a heavy fermion superconductor UPt3 is a topological Weyl superconductor with tunable Weyl nodes. Adopting a generic order parameter in the E-2u representation allowed by nonsymmorphic crystal symmetry, we clarify unusual gap structure and associated topological properties. The pair creation, pair annihilation, and coalescence of Weyl nodes are demonstrated in the time-reversal symmetry broken B-phase. At most 98 point nodes compatible with Blount's theorem give rise to line-node-like behaviors in low-energy excitations, consistent with experimental results. We also show an arc node protected by the nonsymmorphic crystal symmetry on the Brillouin zone face, which is a counterexample of Blount's theorem.

【 授权许可】

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