SUPERCONDUCTING-INSULATING TRANSITION IN 2-DIMENSIONAL ALPHA-MOGE THIN-FILMS

被引：341

作者：

YAZDANI, A ^{[1
]}

KAPITULNIK, A ^{[1
]}

机构：

[1] STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.74.3037

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A zero-temperature magnetic-field-tuned superconducting-insulating transition is observed in two-dimensional a-MoGe films. The low temperature transport properties of these films show scaling behavior consistent with a transition driven by long-range Coulomb interactions and quantum phase fluctuations in a two-dimensional superconductor. However, contrary to the theoretical predictions we find the critical resistance to be sample dependent. We suggest that the apparent lack of universality in the critical resistance is due to the finite contribution of fermionic excitations to the resistance. © 1995 The American Physical Society.

引用

页码：3037 / 3040

页数：4

共 10 条

[1] SUPERCONDUCTIVITY IN A HIGH MAGNETIC-FIELD - EXCITATION SPECTRUM AND TUNNELING PROPERTIES [J].

DUKAN, S ;

TESANOVIC, Z .

PHYSICAL REVIEW B, 1994, 49 (18) :13017-13023

[2] THERMAL FLUCTUATIONS, QUENCHED DISORDER, PHASE-TRANSITIONS, AND TRANSPORT IN TYPE-II SUPERCONDUCTORS [J].

FISHER, DS ;

FISHER, MPA ;

HUSE, DA .

PHYSICAL REVIEW B, 1991, 43 (01) :130-159

[3] QUANTUM PHASE-TRANSITIONS IN DISORDERED 2-DIMENSIONAL SUPERCONDUCTORS [J].

FISHER, MPA .

PHYSICAL REVIEW LETTERS, 1990, 65 (07) :923-926

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

GRAYBEAL, JM ;

BEASLEY, MR .

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

[5] MAGNETIC-FIELD-TUNED SUPERCONDUCTOR-INSULATOR TRANSITION IN 2-DIMENSIONAL FILMS [J].

HEBARD, AF ;

PAALANEN, MA .

PHYSICAL REVIEW LETTERS, 1990, 65 (07) :927-930

[6]

HEBARD AF, 1993, STRONGLY CORRELATED

[7]

LARKIN AI, 1979, J LOW TEMP PHYS, V43, P409

[8] LOW-TEMPERATURE INSULATING PHASES OF UNIFORMLY DISORDERED 2-DIMENSIONAL SUPERCONDUCTORS [J].

PAALANEN, MA ;

HEBARD, AF ;

RUEL, RR .

PHYSICAL REVIEW LETTERS, 1992, 69 (10) :1604-1607

[9]

SIEDLER GT, 1992, PHYS REV B, V45, P10162

[10] FIELD-INDUCED SUPERCONDUCTOR-TO-INSULATOR TRANSITIONS IN JOSEPHSON-JUNCTION ARRAYS [J].

VANDERZANT, HSJ ;

FRITSCHY, FC ;

ELION, WJ ;

GEERLIGS, LJ ;

MOOIJ, JE .

PHYSICAL REVIEW LETTERS, 1992, 69 (20) :2971-2974

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