Evidence for broken time-reversal symmetry in the superconducting phase of URu2Si2

Article

关键词: SI-29 NMR;    ORDER;    SCATTERING;    PRESSURE;    SYSTEM;   

DOI  :  10.1103/PhysRevB.91.140506

来源: SCIE

【 摘 要 】

Recent experimental and theoretical interest in the superconducting phase of the heavy-fermion material URu2Si2 has led to a number of proposals in which the superconducting order parameter breaks time-reversal symmetry (TRS). In this study we measure the polar Kerr effect (PKE) as a function of temperature for several high-quality single crystals of URu2Si2. We find an onset of PKE below the superconducting transition that is consistent with a TRS-breaking order parameter. This effect appears to be independent of an additional, possibly extrinsic, PKE generated above the hidden order transition at T-HO = 17.5 K, and contains a structure below T-c suggestive of additional physics within the superconducting state.

【 授权许可】

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