Abstract
We briefly review the recent progress on the study of weakly correlated non-centrosymmetric (NCS) superconductors, with an emphasis on their novel pairing symmetry and the upper critical field arising from the absence of inversion symmetry. Measurements of penetration depth, specific heat, NMR, etc., have shown that non-BCS-like superconductivity with a nodal gap structure may appear in simple metallic NCS superconductors, which allows the admixture of spin-singlet and spin-triplet pairing states attributed to the antisymmetric spin-orbital coupling (ASOC). Furthermore, large upper critical field with a value exceeding the Pauli paramagnetic limit was also experimentally observed in NCS superconductors.
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