强非平衡区非定域涡旋运动的恢复
Reversal of Nonlocal Vortex Motion in the Regime of Strong Nonequilibrium
摘要：
我们研究了弱钉扎a-NbGe纳米结构中的非局域涡旋运动，它由传输电流I驱动，并被远程检测为非局域电压Vnl。在高I下，测量的VnI表现出在低温和高温下对于相反极性的I发生的戏剧性符号反转。在大abs（I）处，Vnl的符号变得与驱动电流的符号无关。这些不寻常的效果几乎可以定量地解释了一种新的增强磁化，所产生的准粒子在高T的非平衡分布，以及能斯特效应导致的局部电子加热在低T。
英文摘要：
We investigate nonlocal vortex motion in weakly pinning a-NbGe nanostructures, which is driven by a transport current I and remotely detected as a nonlocal voltage Vnl. At high I, the measured Vnl exhibits dramatic sign reversals that at low and high temperatures T occur for opposite polarities of I. The sign of Vnl becomes independent of that of the drive current at large abs(I). These unusual effects can be nearly quantitatively explained by a novel enhancement of magnetization, arising from a nonequilibrium distribution of quasiparticles at high T, and a Nernst-like effect resulting from local electron heating at low T.
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