Decay lengths for diffusive transport activated by Andreev reflections in Al/n-GaAs/Al superconductor-semiconductor-superconductor junctions

被引：61

作者：

Kutchinsky, J ^{[1
]}

Taboryski, R ^{[1
]}

Clausen, T ^{[1
]}

Sorensen, CB ^{[1
]}

Kristensen, A ^{[1
]}

Lindelof, PE ^{[1
]}

Hansen, JB ^{[1
]}

Jacobsen, CS ^{[1
]}

Skov, JL ^{[1
]}

机构：

[1] TECH UNIV DENMARK,DEPT PHYS,DK-2800 LYNGBY,DENMARK

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.78.931

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a highly doped GaAs semiconductor with superconducting contacts of Al, clear conductance peaks are observed at zero voltage bias and at V = +/-2 Delta/e, +/-Delta/e. The subharmonic energy gap structure originates from Andreev scattering with diffusive, but energy conserving, transport in the GaAs. The zero bias excess conductance is due to phase-coherent transport. Both effects are suppressed when the distance between the superconducting electrodes exceeds the inelastic diffusion length in the GaAs normal channel.

引用

页码：931 / 934

页数：4

共 21 条

[1] ANDREEV AF, 1964, SOV PHYS JETP-USSR, V19, P1228
[2] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION
BLONDER, GE
TINKHAM, M
KLAPWIJK, TM
[J]. PHYSICAL REVIEW B, 1982, 25 (07): : 4515 - 4532
[3] Long-range coherence in a mesoscopic metal near a superconducting interface
Courtois, H
Gandit, P
Mailly, D
Pannetier, B
[J]. PHYSICAL REVIEW LETTERS, 1996, 76 (01) : 130 - 133
[4] MESOSCOPIC TRANSPORT IN TUNABLE ANDREEV INTERFEROMETERS
DEVEGVAR, PGN
FULTON, TA
MALLISON, WH
MILLER, RE
[J]. PHYSICAL REVIEW LETTERS, 1994, 73 (10) : 1416 - 1419
[5] PHASE-DEPENDENT RESISTANCE IN A SUPERCONDUCTOR 2-DIMENSIONAL-ELECTRON-GAS QUASI-PARTICLE INTERFEROMETER
DIMOULAS, A
HEIDA, JP
VONWEES, BJ
KLAPWIJK, TM
VANDERGRAAF, W
BORGHS, G
[J]. PHYSICAL REVIEW LETTERS, 1995, 74 (04) : 602 - 605
[6] SUBHARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING WEAK LINKS
FLENSBERG, K
HANSEN, JB
OCTAVIO, M
[J]. PHYSICAL REVIEW B, 1988, 38 (13): : 8707 - 8711
[7] SUBHARMONIC ENERGY-GAP STRUCTURE AND A JOSEPHSON-RADIATION-ENHANCED GAP IN DAYEM BRIDGES
GREGERSH.PE
HENDRICKS, E
LEVINSEN, MT
PICKETT, GR
[J]. PHYSICAL REVIEW LETTERS, 1973, 31 (08) : 524 - 527
[8] HENISH HK, 1989, SEMICONDUCTOR CONTAC, P14
[9] HIKAMI S, 1980, PROG THEOR PHYS, V63, P707, DOI 10.1143/PTP.63.707
[10] OBSERVATION OF PAIR CURRENTS IN SUPERCONDUCTOR-SEMICONDUCTOR CONTACTS
KASTALSKY, A
KLEINSASSER, AW
GREENE, LH
BHAT, R
MILLIKEN, FP
HARBISON, JP
[J]. PHYSICAL REVIEW LETTERS, 1991, 67 (21) : 3026 - 3029

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