ELECTRICAL CHARACTERIZATION OF NB/AL-OXIDE/NB JOSEPHSON-JUNCTIONS WITH HIGH CRITICAL-CURRENT DENSITIES

被引：16

作者：

KLEINSASSER, AW

MALLISON, WH

MILLER, RE

ARNOLD, GB

机构：

[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

[2] AT&T BELL LABS,MURRAY HILL,NJ 07974

[3] UNIV NOTRE DAME,NOTRE DAME,IN 46556

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.403156

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Transport in Nb/AlOx/Nb junctions involves two parallel channels, barrier defects (pinholes) with sub-nanometer dimensions and nearly-ideal tunneling regions. We fit junction characteristics using only a single parameter, the ratio of the normal state conductances of these current paths. Our barrier model accounts for the excellent Josephson behavior and highly non-ideal quasiparticle characteristics of junctions with critical current densities as high as 4 mA/mu m(2). It appears to be quite generally applicable to tunnel junctions.

引用

页码：2735 / 2738

页数：4

共 14 条

[1]

ALDERHOF DJ, 1990, PHYSICA B, V165, P1581

[2] SUPERCONDUCTING TUNNELING WITHOUT THE TUNNELING HAMILTONIAN .2. SUBGAP HARMONIC STRUCTURE [J].

ARNOLD, GB .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1987, 68 (1-2) :1-27

[3]

BARONE A, 1982, PHYSICS APPLICATIONS, P69

[4] 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

[5] DESIGN CONSIDERATIONS FOR DC SQUIDS FABRICATED IN DEEP SUBMICRON TECHNOLOGY [J].

KETCHEN, MB .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (02) :2916-2919

[6] EXPLANATION OF SUB-HARMONIC ENERGY-GAP STRUCTURE IN SUPERCONDUCTING CONTACTS [J].

KLAPWIJK, TM ;

BLONDER, GE ;

TINKHAM, M .

PHYSICA B & C, 1982, 109 (1-3) :1657-1664

[7] DEGRADATION OF SUPERCONDUCTING TUNNEL JUNCTION CHARACTERISTICS WITH INCREASING BARRIER TRANSPARENCY [J].

KLEINSASSER, AW ;

RAMMO, FM ;

BHUSHAN, M .

APPLIED PHYSICS LETTERS, 1993, 62 (09) :1017-1019

[8] OBSERVATION OF MULTIPLE ANDREEV REFLECTIONS IN SUPERCONDUCTING TUNNEL-JUNCTIONS [J].

KLEINSASSER, AW ;

MILLER, RE ;

MALLISON, WH ;

ARNOLD, GB .

PHYSICAL REVIEW LETTERS, 1994, 72 (11) :1738-1741

[9] RSFQ Logic/Memory Family: A New Josephson-Junction Technology for Sub-Terahertz-Clock-Frequency Digital Systems [J].

Likharev, K. K. ;

Semenov, V. K. .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1991, 1 (01) :3-28

[10]

LIKHAREV KK, 1986, DYNAMICS JOSEPHSON J, P27

← 1 2 →