Extreme vortex pinning in the noncentrosymmetric superconductor CePt3Si
Extreme vortex pinning in the noncentrosymmetric superconductor CePt3Si
复制标题
非中心对称超导体 CePt3Si 中的极端涡钉扎
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. Bauer
中科院分区：
文献类型：
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作者：
C. Miclea;A. Mota;M. Nicklas;R. Cardoso;F. Steglich;M. Sigrist;A. Prokofiev;E. Bauer
本文报道了非中心对称重费米子超导体CePt$_{3}$Si单晶的涡旋动力学。残余磁化的衰减显示出干净的对数时间依赖性，其速率遵循Kim-Anderson理论所期望的温度依赖性。蠕变速率低于在任何其他中心对称超导体中观察到的，并且不是由高临界电流引起的。相反，CePt$_{3}$Si的临界电流明显低于其他具有强涡旋钉钉的超导体，这表明该超导体中可能存在通量线运动的替代障碍。
We report on the vortex dynamics of a single crystal of the non-centrosymmetric heavy-fermion superconductor CePt$_{3}$Si. Decays of the remnant magnetization display a clean logarithmic time dependence with rates that follow the temperature dependence expected from the Kim-Anderson theory. The creep rates are lower than observed in any other centrosymmetric superconductor and are not caused by high critical currents. On the contrary, the critical current in CePt$_{3}$Si is considerably lower than in other superconductors with strong vortex pinning indicating that an alternative impediment on the flux line motion might be at work in this superconductor.