2-DIMENSIONAL VORTEX FLUCTUATIONS IN THE NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS FOR HIGH-TEMPERATURE SUPERCONDUCTORS
2-DIMENSIONAL VORTEX FLUCTUATIONS IN THE NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS FOR HIGH-TEMPERATURE SUPERCONDUCTORS
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DOI：
10.1103/physrevlett.66.1630
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发表时间：
1991-03-25
影响因子：
8.6
通讯作者：
MINNHAGEN, P
中科院分区：
文献类型：
--
作者：
JENSEN, HJ;MINNHAGEN, P
根据 CuO2 平面中的热激活涡流-反涡流对讨论非线性电流-电压 (I-V) 特性。 由于面间耦合，一对涡旋中的两个涡旋的相互作用能随着它们的分离而线性增长。 这种线性相互作用产生随温度线性减小的临界电流。 I-V 特性的形式为 V，近似为 I(I - Ic)a(T)-1。 讨论了与 Y-Ba-Cu-O 实验的比较。 我们认为磁场情况下的 I-V 数据可能与热涡旋释放转变有关。
The nonlinear current-voltage (I-V) characteristics are discussed in terms of thermally activated vortex-antivortex pairs in the CuO2 planes. The interaction energy of the two vortices in a pair grows linearly with their separation due to the interplane coupling. This linear interaction gives rise to a critical current which decreases linearly with the temperature. The I-V characteristics has the form V approximately I(I - Ic)a(T)-1. Comparisons with experiments on Y-Ba-Cu-O are discussed. We suggest that the I-V data in the case of a magnetic field may be associated with a thermal vortex-unbinding transition.