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arXiv 1101.3145cond-mat.supr-con
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非中心对称超导体Y2C3中的大上临界场

Large upper critical field in non-centrosymmetric superconductor Y2C3

H. Q. Yuan, J. Chen, J. Singleton, S. Akutagawa, J. Akimitsu

摘要:

我们用两种不同的方法确定非中心对称超导体$Y_2 C_3$的上临界场$μ_0 H_{c2}(T_c)$:体磁化强度M(T)和基于隧道二极管振荡器(TDO)的阻抗测量。发现零温下的上临界场达到30T,超过了弱耦合泡利顺磁极限。我们认为,在$Y_2 C_3$中观察到如此大的$μ_0 H_{c2}(0)$可以归因于自旋单重态和自旋三重态配对态的混合,这是由于反转对称性破缺的结果。

英文摘要:

We determine the upper critical field $μ_0 H_{c2}(T_c)$ of non-centrosymmetric superconductor $Y_2 C_3$ using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is found that the upper critical field reaches a value of 30T at zero temperature which is above the weak-coupling Pauli paramagnetic limit. We argue that the observation of such a large $μ_0 H_{c2}(0)$ in $Y_2 C_3$ could be attributed to the admixture of spin-singlet and spin-triplet pairing states as a result of broken inversion symmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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