ELECTRON-TUNNELING DETERMINATION OF THE ORDER-PARAMETER AMPLITUDE AT THE SUPERCONDUCTOR-INSULATOR TRANSITION IN 2D

被引：148

作者：

VALLES, JM

DYNES, RC

GARNO, JP

机构：

[1] UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093

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

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.69.3567

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the behavior of the superconducting energy gap DELTA in ultrathin films of quench condensed Bi near the superconductor-insulator (SI) transition. From electron tunneling measurements on these films, we conclude that DELTA becomes very small and approaches zero at the SI transition. We studied high-sheet-resistance films with T(c0)'s as low as 0.19 K. This is a factor of 40 lower than the low-sheet-resistance film T(c0) of 6.4 K.

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页码：3567 / 3570

页数：4

相关论文

共 23 条

[1]

ALTSHULER BL, 1984, ZH EKSP TEOR FIZ, V59, P415

[2] RELATION BETWEEN THE TC DEGRADATION AND THE CORRELATION GAP IN DISORDERED SUPERCONDUCTORS [J].

BELITZ, D .

PHYSICAL REVIEW B, 1989, 40 (01) :111-114

[3] SUPERCONDUCTING FLUCTUATIONS IN A MAGNETIC FIELD [J].

BERGMANN, G .

ZEITSCHRIFT FUR PHYSIK, 1969, 225 (05) :430-&

[4] UNIVERSAL CONDUCTIVITY OF 2-DIMENSIONAL FILMS AT THE SUPERCONDUCTOR-INSULATOR TRANSITION [J].

CHA, MC ;

FISHER, MPA ;

GIRVIN, SM ;

WALLIN, M ;

YOUNG, AP .

PHYSICAL REVIEW B, 1991, 44 (13) :6883-6902

[5] POWER-LAW TEMPERATURE-DEPENDENCE OF THE INELASTIC-SCATTERING RATE IN DISORDERED SUPERCONDUCTORS [J].

DEVEREAUX, TP ;

BELITZ, D .

PHYSICAL REVIEW B, 1991, 43 (04) :3736-3739

[6] 2-DIMENSIONAL ELECTRICAL-CONDUCTIVITY IN QUENCH-CONDENSED METAL-FILMS [J].

DYNES, RC ;

GARNO, JP ;

ROWELL, JM .

PHYSICAL REVIEW LETTERS, 1978, 40 (07) :479-482

[7] BREAKDOWN OF ELIASHBERG THEORY FOR TWO-DIMENSIONAL SUPERCONDUCTIVITY IN THE PRESENCE OF DISORDER [J].

DYNES, RC ;

WHITE, AE ;

GRAYBEAL, JM ;

GARNO, JP .

PHYSICAL REVIEW LETTERS, 1986, 57 (17) :2195-2198

[8]

FISHER MPA, 1989, PHYS REV B, V40, P546, DOI 10.1063/1.38820

[9] PRESENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS - UNIVERSAL RESISTANCE AT THE SUPERCONDUCTOR-INSULATOR TRANSITION [J].

FISHER, MPA ;

GRINSTEIN, G ;

GIRVIN, SM .

PHYSICAL REVIEW LETTERS, 1990, 64 (05) :587-590

[10] LOCALIZATION AND INTERACTION EFFECTS IN ULTRATHIN AMORPHOUS SUPERCONDUCTING FILMS [J].

GRAYBEAL, JM ;

BEASLEY, MR .

PHYSICAL REVIEW B, 1984, 29 (07) :4167-4169