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首页> 外文期刊>Physica, B. Condensed Matter >Magnetic response of noncentrosymmetric superconductor La2C3: Effect of double-gap and spin-orbit interaction
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Magnetic response of noncentrosymmetric superconductor La2C3: Effect of double-gap and spin-orbit interaction

机译：非中心对称超导体La2C3的磁响应：双间隙和自旋轨道相互作用的影响

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摘要

The presence of spin-orbit (SO) Interaction in a noncentrosymmetric superconductor, La2C3 (T-c similar or equal to 11 K) is demonstrated by muon spin rotation (mu SR) in its normal state, where mu SR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (sigma(v)) exhibits a field dependence that is characterized by a kink, where sigma(v) (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of sigma(v), and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.
机译：在非中心对称超导体La2C3（Tc等于或等于11 K）中存在自旋轨道（SO）相互作用，这是通过其正常状态下的μ子自旋旋转（mu SR）证明的，其中mu SR光谱表现出场致弱去极化由于van Vleck样的局部易感性。在混合状态下，由于内部电场（sigma（v））的不均匀性导致的介子自旋弛豫表现出以扭结为特征的电场依赖性，其中在较低电场下σ（v）（因此，超流体密度）会大大降低。这完全符合先前根据sigma（v）的温度依赖性推断出的第二能隙，并且还与由于SO相互作用引起的费米表面不对称变形的可能影响一致。

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