Large upper critical field in non-centrosymmetric superconductor Y2C3

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

doi:10.1016/j.jpcs.2010.10.072

Large upper critical field in non-centrosymmetric superconductor Y2C3

Superconductivity 2015-03-17 v1

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

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Abstract

We determine the upper critical field $\mu_0 H_{c2}(T_c)$ 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 $\mu_0 H_{c2}(0)$ 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.

Keywords

upper critical field non-centrosymmetric superconductor Y2C3 Pauli paramagnetic limit spin-singlet and spin-triplet pairing

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@article{arxiv.1101.3145,
  title  = {Large upper critical field in non-centrosymmetric superconductor Y2C3},
  author = {H. Q. Yuan and J. Chen and J. Singleton and S. Akutagawa and J. Akimitsu},
  journal= {arXiv preprint arXiv:1101.3145},
  year   = {2015}
}

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4 pages, 3 figures, accepted by J. Phys. Chem. Solids

Large upper critical field in non-centrosymmetric superconductor Y2C3

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