Proximity and Josephson effects in superconductor-two-dimensional electron gas planar junctions
作者： A.F. Volkov , P.H.C. Magnée , B.J. van Wees , T.M. Klapwijk
DOI: 10.1016/0921-4534(94)02429-4
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摘要: The DC Josephson effect is theoretically studied in a planar junction in which a two-dimensional electron gas (2DEG) infinite in lateral directions is in contact with two superconducting electrodes placed on top of the 2DEG. An energy gap in the excitation spectrum is created in the 2DEG due to the proximity effect. It is shown that under certain conditions, the region of the 2DEG underneath the superconductors is analogous to a superconducting region with an order parameter ϵg exp (i∅), where ϵg (ϵg< Δ) depends on …
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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
Richard A. Morrow, Kenneth R. Brownstein, Model effective-mass Hamiltonians for abrupt heterojunctions and the associated wave-function-matching conditions Physical Review B. ,vol. 30, pp. 678- 680 ,(1984) , 10.1103/PHYSREVB.30.678
Gerald B. Arnold, Transmission coefficient of a metal-metal interface in the tight-binding model Physical Review B. ,vol. 25, pp. 5998- 6001 ,(1982) , 10.1103/PHYSREVB.25.5998
John Bardeen, Jared L. Johnson, Josephson Current Flow in Pure Superconducting-Normal-Superconducting Junctions Physical Review B. ,vol. 5, pp. 72- 78 ,(1972) , 10.1103/PHYSREVB.5.72
Chanh Nguyen, Herbert Kroemer, Evelyn L. Hu, Anomalous Andreev conductance in InAs-AlSb quantum well structures with Nb electrodes Physical Review Letters. ,vol. 69, pp. 2847- 2850 ,(1992) , 10.1103/PHYSREVLETT.69.2847
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
Gerald B. Arnold, Theory of thin proximity-effect sandwiches Physical Review B. ,vol. 18, pp. 1076- 1100 ,(1978) , 10.1103/PHYSREVB.18.1076
J. Bar-Sagi, Ora Entin-Wohlman, Energy gap in a superconductor — normal proximity — effect sandwich Solid State Communications. ,vol. 22, pp. 29- 31 ,(1977) , 10.1016/0038-1098(77)90936-X
B. J. van Wees, H. van Houten, C. W. J. Beenakker, J. G. Williamson, L. P. Kouwenhoven, D. van der Marel, C. T. Foxon, Quantized conductance of point contacts in a two-dimensional electron gas. Physical Review Letters. ,vol. 60, pp. 848- 850 ,(1988) , 10.1103/PHYSREVLETT.60.848
Chikara Ishii, Josephson Currents through Junctions with Normal Metal Barriers Progress of Theoretical Physics. ,vol. 44, pp. 1525- 1547 ,(1970) , 10.1143/PTP.44.1525