Model for Unconventional Superconductivity of Sr2RuO4 : Effect of Impurity Scattering on Time-Reversal Breaking Triplet Pairing with a Tiny Gap
Model for Unconventional Superconductivity of Sr2RuO4 : Effect of Impurity Scattering on Time-Reversal Breaking Triplet Pairing with a Tiny Gap
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DOI：
10.1103/physrevlett.83.1423
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发表时间：
1999-08
影响因子：
8.6
通讯作者：
K. Miyake;O. Narikiyo
中科院分区：
文献类型：
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作者：
K. Miyake;O. Narikiyo
为了解决这一难题，提出了Sr 2 RuO 4 非常规超导模型。结果表明，短程铁磁自旋涨落产生了类 p 对称性的三重态配对，该三重态配对打破了时间反演对称性，并且由于 Sr 2 RuO 4 费米表面特征的显着形状而具有微小的间隙。单位性极限中的非磁性杂质散射效应被证明可以很容易地填充微小的间隙，从而产生可观的剩余态密度，这一致地解释了迄今为止观察到的令人费解的特性。
A model for unconventional superconductivity of Sr 2 RuO 4 is presented to resolve its puzzle. It is shown that the short-range ferromagnetic spin fluctuations give rise to the triplet pairing with p -like symmetry which is breaking the time-reversal symmetry and has a tiny gap due to the salient shape of the Fermi surface characteristic to Sr 2 RuO 4 . The effect of nonmagnetic-impurity scattering in the unitarity limit is shown to fill up easily the tiny gap giving rise to an appreciable residual density of states, which explains consistently the puzzling properties observed so far.