Bezuglyi E V, Vinokur V
Institute for Low Temperature Physics and Engineering, Kharkov, 61103 Ukraine.
Phys Rev Lett. 2003 Sep 26;91(13):137002. doi: 10.1103/PhysRevLett.91.137002. Epub 2003 Sep 25.
We study heat and charge transport through a normal diffusive wire coupled with a superconducting wire over the region smaller than the coherence length. Because of partial Andreev reflection of quasiparticles from the interface, the subgap thermal flow is essentially suppressed and approaches zero along with energy, which is specific for diffusive structures. Whereas the electric conductance shows a conventional reentrance effect, the thermal conductance kappa rapidly decreases with temperature which qualitatively explains the results of recent experiments. In the Andreev interferometer geometry, kappa experiences full-scale oscillations with the order parameter phase difference.
我们研究了在小于相干长度的区域内，通过与超导线耦合的正常扩散线的热输运和电荷输运。由于准粒子从界面的部分安德列夫反射，亚能隙热流基本上被抑制，并且随着能量趋近于零，这是扩散结构所特有的。而电导显示出传统的再入效应，热导率κ随温度迅速降低，这定性地解释了最近实验的结果。在安德列夫干涉仪几何结构中，κ随序参量相位差经历全尺度振荡。
