论文标题
时间逆转对称性与bardeen-cooper-schrieffer类似于la $ _ $ _ {7} $ pd $ _ {3} $的证据
Evidence for the coexistence of time-reversal symmetry breaking and Bardeen-Cooper-Schrieffer-like superconductivity in La$_{7}$Pd$_{3}$
论文作者
论文摘要
带有Bardeen-Cooper-Schrieffer（BCS）类似超导的时间反转对称性（TRSB）发生在小但越来越多的非中心对称（NCS）材料中，尽管该机制知之甚少。我们呈现热容量，磁化，电阻率和MUON自旋共振/放松（$μ$ sr）的测量，对NCS la $ _ $ _ {7} $ pd $ _ {3} $的多晶样品进行测量。横向场$ $ $ $ SR和热容量数据显示LA $ _ {7} $ PD $ _ {3} $是具有BCS样间隙结构的类型 - II超导体，而零视野$μ$ SR结果提供了TRSB的证据。我们讨论了这些结果对LA $ _ {7} x_ {3} $的含义（其中$ x = $ x = $ ni，pd，rh，ir）组的超导体和其他CS和NCS和NCS超导体已观察到TRSB。
Time-reversal symmetry breaking (TRSB) with a Bardeen-Cooper-Schrieffer (BCS) -like superconductivity occurs in a small, but growing number of noncentrosymmetric (NCS) materials, although the mechanism is poorly understood. We present heat capacity, magnetization, resistivity, and muon spin resonance/relaxation ($μ$SR) measurements on polycrystalline samples of NCS La$_{7}$Pd$_{3}$. Transverse-field $μ$SR and heat capacity data show La$_{7}$Pd$_{3}$ is a type-II superconductor with a BCS-like gap structure, while zero-field $μ$SR results provide evidence of TRSB. We discuss the implications of these results for both the La$_{7}X_{3}$ (where $X=$ Ni, Pd, Rh, Ir) group of superconductors and other CS and NCS superconductors for which TRSB has been observed.
