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中国物理学会期刊

高温超导体中的涡旋运动和Hall效应——依赖时间的金兹堡-朗道理论近似

CSTR: 32037.14.aps.46.2431

VORTEX MOTION AND THE HALL EFFECT IN HIGH TEMPERATURE SUPERCONDUCTORS——A TIME DEPENDANT GINZBURG LANDAU THEORY APPROACH

CSTR: 32037.14.aps.46.2431
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  • 从依赖时间的金兹堡朗道方程(TDGL方程)出发研究高温超导体的涡旋运动序参量,考虑为一个复数.利用层状模型(Lawrence-Doniach模型),由TDGL方程与L-D模型结合,从而讨论高温超导体的Hall效应,涡旋运动的数字系数,用序参量的解计算出来。建立模型,从TDGL出发,对涡旋运动方程进行偏微分,从而计算出纵向传导和Hall传导,讨论Hall角的符号改变和Hall效应的奇异性。这些讨论拟合Hall效应的符号改变与混合态高温超导体观察到的Hall效应的结果。

     

    Vortex motion in high-temperature superconductors is studied starting from a variant of the time-dependent Ginzberg-Landau(TDGL) equations,in which the order-parameter relaxation time is taken to be complex.Using Lawrence-Doniach model and considering a TDGL model modified to take into account the Hall- effect,-we have evaluated and discussed the sign change of the Hall angle and anomalous Hall effect.The results are discussed in light of rather puzzling sign change of the Hall effect which has been observed in the mixed state of the high-temperature Superconductors.

     

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