OBSERVATION OF MAXIMUM SUPERCURRENT QUANTIZATION IN A SUPERCONDUCTING QUANTUM POINT-CONTACT

被引：175

作者：

TAKAYANAGI, H

AKAZAKI, T

NITTA, J

机构：

[1] NTT Basic Research Laboratories, Atsugi-Shi, Kanagawa 243-01

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.75.3533

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have confirmed the quantization of the critical current in a superconducting quantum point contact consisting of a split-gate superconductor-(two-dimensional electron gas)-superconductor junction. The critical current and conductance show stepwise changes as a function of the gate voltage. We also observed resonant structure resulting from quantum interference of quasiparticles at the step edge.

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页码：3533 / 3536

页数：4

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共 20 条

[1] IMPROVING THE MOBILITY OF AN IN0.52AL0.48AS/IN0.53GA0.47AS INVERTED MODULATION-DOPED STRUCTURE BY INSERTING A STRAINED INAS QUANTUM-WELL [J].

AKAZAKI, T ;

NITTA, J ;

TAKAYANAGI, H ;

ENOKI, T ;

ARAI, K .

APPLIED PHYSICS LETTERS, 1994, 65 (10) :1263-1265

[2]

AVERIN D, UNPUB

[3] QUANTUM TRANSPORT IN SEMICONDUCTOR-SUPERCONDUCTOR MICROJUNCTIONS [J].

BEENAKKER, CWJ .

PHYSICAL REVIEW B, 1992, 46 (19) :12841-12844

[4] CRITICAL CURRENTS AND SUPERCURRENT OSCILLATIONS IN JOSEPHSON FIELD-EFFECT TRANSISTORS [J].

CHRESTIN, A ;

MATSUYAMA, T ;

MERKT, U .

PHYSICAL REVIEW B, 1994, 49 (01) :498-504

[5] SUBHARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING WEAK LINKS [J].

FLENSBERG, K ;

HANSEN, JB ;

OCTAVIO, M .

PHYSICAL REVIEW B, 1988, 38 (13) :8707-8711

[6] THEORY OF QUANTUM CONDUCTION OF SUPERCURRENT THROUGH A CONSTRICTION [J].

FURUSAKI, A ;

TAKAYANAGI, H ;

TSUKADA, M .

PHYSICAL REVIEW LETTERS, 1991, 67 (01) :132-135

[7] JOSEPHSON EFFECT OF THE SUPERCONDUCTING QUANTUM POINT CONTACT [J].

FURUSAKI, A ;

TAKAYANAGI, H ;

TSUKADA, M .

PHYSICAL REVIEW B, 1992, 45 (18) :10563-10575

[8] MESOSCOPIC SUPERCONDUCTOR SEMICONDUCTOR HETEROSTRUCTURES [J].

KLAPWIJK, TM .

PHYSICA B-CONDENSED MATTER, 1994, 197 (1-4) :481-499

[9] SUPERCONDUCTING CONTACTS TO A TWO-DIMENSIONAL ELECTRON GAS IN GaAs/AlGaAs-HETEROSTRUCTURES [J].

Lenssen, K. -M. H. ;

Matters, M. ;

Harmans, C. J. P. M. ;

Mooij, J. E. ;

Leys, M. R. ;

van der Vleuten, W. ;

Wolter, J. H. .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1993, 3 (01) :1961-1963

[10] CONDUCTANCE AND SUPERCURRENT DISCONTINUITIES IN ATOMIC-SCALE METALLIC CONSTRICTIONS OF VARIABLE WIDTH [J].

MULLER, CJ ;

VANRUITENBEEK, JM ;

DEJONGH, LJ .

PHYSICAL REVIEW LETTERS, 1992, 69 (01) :140-143