Universal transport in two-dimensional granular superconductors

被引：52

作者：

Frydman, A ^{[1
]}

Naaman, O

Dynes, RC

机构：

[1] Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.66.052509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transport properties of quench condensed granular superconductors (Pb, Sn, and Pb-Ag films) are presented and analyzed. These systems exhibit transitions from insulating to superconducting behavior as a function of intergrain spacing. Superconductivity is characterized by broad transitions in which the resistance drops exponentially with reducing temperature. The slope of the log R versus T curves turns out to be universally dependent on the normal state film resistance for all measured granular systems. It does not depend on the material, critical temperature, geometry, or experimental setup. We discuss possible physical scenarios to explain these findings.

引用

页码：525091 / 525094

页数：4

共 15 条

[1] VOLTAGE DUE TO THERMAL NOISE IN DC JOSEPHSON EFFECT
AMBEGAOKAR, V
HALPERIN, BI
[J]. PHYSICAL REVIEW LETTERS, 1969, 22 (25) : 1364 - +
[2] TUNNELING INTO GRANULAR PH FILMS IN THE SUPERCONDUCTING AND INSULATING REGIMES
BARBER, RP
MERCHANT, LM
LAPORTA, A
DYNES, RC
[J]. PHYSICAL REVIEW B, 1994, 49 (05) : 3409 - 3412
[3] LOW-FIELD MAGNETORESISTANCE IN GRANULAR PB FILMS NEAR THE INSULATOR-SUPERCONDUCTOR TRANSITION
BARBER, RP
DYNES, RC
[J]. PHYSICAL REVIEW B, 1993, 48 (14): : 10618 - 10621
[4] HYPERRESISTIVITY TO GLOBAL-SUPERCONDUCTIVITY TRANSITION BY ANNEALING IN QUENCH-CONDENSED PB FILMS
BARBER, RP
GLOVER, RE
[J]. PHYSICAL REVIEW B, 1990, 42 (10): : 6754 - 6757
[5] 2-DIMENSIONAL ELECTRICAL-CONDUCTIVITY IN QUENCH-CONDENSED METAL-FILMS
DYNES, RC
GARNO, JP
ROWELL, JM
[J]. PHYSICAL REVIEW LETTERS, 1978, 40 (07) : 479 - 482
[6] Morphology of quench condensed Pb films near the insulator to metal transition
Ekinci, KL
Valles, JM
[J]. PHYSICAL REVIEW LETTERS, 1999, 82 (07) : 1518 - 1521
[7] Granular superconductors and ferromagnets: A proximity-effect-based analogue
Frydman, A.
Dynes, R.C.
[J]. Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, 2001, 81 (9 SPEC.): : 1153 - 1165
[8] Frydman A, 2000, PHYS STATUS SOLIDI B, V218, P173, DOI 10.1002/(SICI)1521-3951(200003)218:1<173::AID-PSSB173>3.0.CO
[9] 2-W
[10] ONSET OF SUPERCONDUCTIVITY IN ULTRATHIN GRANULAR METAL-FILMS
JAEGER, HM
HAVILAND, DB
ORR, BG
GOLDMAN, AM
[J]. PHYSICAL REVIEW B, 1989, 40 (01) : 182 - 196

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