Szabó P, Samuely P, Kacmarcík J, Jansen A G, Briggs A, Lafond A, Meerschaut A
Institute of Experimental Physics, Slovak Academy of Sciences, SK-04353 Kosice, Slovakia.
Phys Rev Lett. 2001 Jun 25;86(26 Pt 1):5990-3. doi: 10.1103/PhysRevLett.86.5990.
The interlayer transport in a two-dimensional superconductor can reveal a peak in the temperature as well as the magnetic field dependence of the resistivity near the superconducting transition. The experiment was performed on the highly anisotropic misfit-layer superconductor (LaSe)(1.14) with T(c) of 1.2 K. The effect is interpreted within the tunneling mechanism of the charge transport across the Josephson-coupled layers via two parallel channels--the quasiparticles and the Cooper pairs. Similar behavior can be found in the high-T(c) cuprates but there it is inevitably interfering with the anomalous normal state. The upper critical magnetic field can be obtained from the interlayer tunneling conductance.
二维超导体中的层间输运可以揭示出在超导转变附近，电阻率随温度以及磁场的变化存在一个峰值。该实验是在临界温度(T_c)为(1.2K)的高度各向异性错配层超导体((LaSe)(1.14))上进行的。这种效应是通过两个平行通道——准粒子和库珀对，在约瑟夫森耦合层间的电荷输运隧穿机制中得到解释的。在高温超导体铜酸盐中也能发现类似行为，但在那里它不可避免地会与反常正常态相互干扰。上临界磁场可以从层间隧穿电导中获得。
