Superconducting proximity effect probed on a mesoscopic length scale

被引:208
作者
Gueron, S
Pothier, H
Birge, NO
Esteve, D
Devoret, MH
机构
[1] Service de Physique de l’Etat Condensé, Commissariat à l’Energie Atomique, Saclay, Gif-sur-Yvette
关键词
D O I
10.1103/PhysRevLett.77.3025
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have measured by tunneling spectroscopy the electronic density of states in a nonsuperconducting wire in good contact with a superconductor, at distances of 200, 300, and 800 nm from the interface. Closest to the interface, the density of states near the Fermi energy is reduced to 55% of its normal value. At the farthest measurement point, this dip has nearly completely disappeared. We compare our data to predictions based on the Usadel equations.
引用
收藏
页码:3025 / 3028
页数:4
相关论文
共 34 条
[1]   INVESTIGATIONS OF PROXIMITY EFFECT BY ELECTRON TUNNELING [J].
ADKINS, CJ ;
KINGTON, BW .
PHYSICAL REVIEW, 1969, 177 (02) :777-&
[2]  
BELZIG W, IN PRESS PHYS REV B
[3]   TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].
BLONDER, GE ;
TINKHAM, M ;
KLAPWIJK, TM .
PHYSICAL REVIEW B, 1982, 25 (07) :4515-4532
[4]  
CLAESON T, 1989, TUNNELING PHENOMENA, P443
[5]   Long-range coherence in a mesoscopic metal near a superconducting interface [J].
Courtois, H ;
Gandit, P ;
Mailly, D ;
Pannetier, B .
PHYSICAL REVIEW LETTERS, 1996, 76 (01) :130-133
[6]   PROXIMITY-INDUCED SUPERCONDUCTIVITY IN A NARROW METALLIC WIRE [J].
COURTOIS, H ;
GANDIT, P ;
PANNETIER, B .
PHYSICAL REVIEW B, 1995, 52 (02) :1162-1166
[7]  
DELOZANNE AL, 1986, NONEQUILIBRIUM SUPER, P111
[8]  
Deutscher G., 1969, Superconductivity, vol.2, P1005
[9]   MESOSCOPIC TRANSPORT IN TUNABLE ANDREEV INTERFEROMETERS [J].
DEVEGVAR, PGN ;
FULTON, TA ;
MALLISON, WH ;
MILLER, RE .
PHYSICAL REVIEW LETTERS, 1994, 73 (10) :1416-1419
[10]   EFFECT OF THE ELECTROMAGNETIC ENVIRONMENT ON THE COULOMB BLOCKADE IN ULTRASMALL TUNNEL-JUNCTIONS [J].
DEVORET, MH ;
ESTEVE, D ;
GRABERT, H ;
INGOLD, GL ;
POTHIER, H ;
URBINA, C .
PHYSICAL REVIEW LETTERS, 1990, 64 (15) :1824-1827