ANDREEV-LEVEL TUNNELING IN A BALLISTIC DOUBLE SUPERCONDUCTOR-NORMAL-METAL-SUPERCONDUCTOR JUNCTION
作者： Victor C. Y. Chang , C. S. Chu
关键词:
摘要: The supercurrent in a mesoscopic, ballistic, and symmetrically stacked, double superconductor--normal-metal--superconductor (SNS) junction is studied. Our focus to establish the features that are associated with Andreev-level tunneling between two SNS junctions. Both geometry dependence gap function studied analyzed terms of quasiparticle scattering processes. worked out analytically by solving Bogoliubov--de Gennes equation within Andreev approximation. current calculated, following Beenakker van Houten [Phys. Rev. Lett. 66, 3056 (1991)], result found differ from transmission approach. Such discrepancy approaches, however, disappear for single junction. In our result, currents normal regions checked be same.
nctu.edu.tw参考文章(25)
C. W. J. Beenakker, Universal limit of critical-current fluctuations in mesoscopic Josephson junctions Physical Review Letters. ,vol. 67, pp. 3836- 3839 ,(1991) , 10.1103/PHYSREVLETT.67.3836
C. W. J. Beenakker, H. van Houten, Josephson current through a superconducting quantum point contact shorter than the coherence length Physical Review Letters. ,vol. 66, pp. 3056- 3059 ,(1991) , 10.1103/PHYSREVLETT.66.3056
Akira Furusaki, Hideaki Takayanagi, Masaru Tsukada, Theory of quantum conduction of supercurrent through a constriction Physical Review Letters. ,vol. 67, pp. 132- 135 ,(1991) , 10.1103/PHYSREVLETT.67.132
Hideaki Takayanagi, Jørn Bindslev Hansen, Junsaku Nitta, Mesoscopic fluctuations of the critical current in a superconductor-normal-conductor-superconductor. Physical Review Letters. ,vol. 74, pp. 166- 169 ,(1995) , 10.1103/PHYSREVLETT.74.166
Hideaki Takayanagi, Tatsushi Akazaki, Junsaku Nitta, Observation of Maximum Supercurrent Quantization in a Superconducting Quantum Point Contact Physical Review Letters. ,vol. 75, pp. 3533- 3536 ,(1995) , 10.1103/PHYSREVLETT.75.3533
A. Martín-Rodero, F. J. García-Vidal, A. Levy Yeyati, Microscopic theory of Josephson mesoscopic constrictions. Physical Review Letters. ,vol. 72, pp. 554- 557 ,(1994) , 10.1103/PHYSREVLETT.72.554
U. Gunsenheimer, U. Schüssler, R. Kümmel, Symmetry breaking, off-diagonal scattering, and Josephson currents in mesoscopic weak links. Physical Review B. ,vol. 49, pp. 6111- 6125 ,(1994) , 10.1103/PHYSREVB.49.6111
Magnus Hurd, Göran Wendin, Andreev level spectrum and Josephson current in a superconducting ballistic point contact. Physical Review B. ,vol. 49, pp. 15258- 15262 ,(1994) , 10.1103/PHYSREVB.49.15258
Gabriel Pérez, Hilda A. Cerdeira, Static parametric fluctuations give nonstatistical behavior in uncoupled chaotic systems Physical Review E. ,vol. 49, ,(1994) , 10.1103/PHYSREVE.49.R15
Fernando Sols, Jaime Ferrer, Crossover from the Josephson effect to bulk superconducting flow. Physical Review B. ,vol. 49, pp. 15913- 15919 ,(1994) , 10.1103/PHYSREVB.49.15913