局部非中心对称SrPtAs的多能隙超导性：As核四极共振研究
Multigap superconductivity in locally non-centrosymmetric SrPtAs: An As nuclear quadrupole resonance investigation
摘要：
我们报告详细的$^{75}$作为NQR调查的局部非中心对称超导体SrPtAs。自旋-晶格弛豫研究证实了弱耦合多能隙超导性。Hebel-Slichter峰是传统超导性的标志，它被强烈抑制，这表明它是一种非传统的超导状态。所观察到的行为排除了超导序参量与线节点和建议的$f$波和手征$d$波序参量是一致的。
英文摘要：
We report detailed $^{75}$As-NQR investigations of the locally non-centrosymmetric superconductor SrPtAs. The spin-lattice relaxation studies prove weakly coupled multi-gap superconductivity. The Hebel-Slichter peak, a hallmark of conventional superconductivity, is strongly suppressed, which points to an unconventional superconducting state. The observed behavior excludes a superconducting order parameter with line nodes and is consistent with proposed $f$-wave and chiral $d$-wave order parameters.
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