Variable-range cotunneling and conductivity of a granular metal

被引：68

作者：

Feigel'man, MV ^{[1
]}

Ioselevich, AS ^{[1
]}

机构：

[1] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 119334, Russia

来源：

JETP LETTERS | 2005年 / 81卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1931015

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Efros-Shklovskii (E-S) law for the conductivity of granular metals is interpreted as a result of a variable-range cotunneling process. The cotunneling between distant resonant grains is predominantly elastic at low T <= T-c, while it is inelastic (i.e., accompanied by creation of electron-hole pairs on a string of intermediate nonresonant grains) at T >= T-c. The corresponding E-S temperature T-ES, in the latter case, is slightly (logarithmically) T dependent. The magnetoresistance in the two cases is different: it may be relatively strong and negative at T < T-c, while, at T > T-c, it is suppressed due to inelastic processes, which destroy the interference. (C) 2005 Pleiades Publishing, Inc.

引用

页码：277 / 283

页数：7

共 18 条

[1] HOPPING CONDUCTIVITY IN DISORDERED SYSTEMS [J].

AMBEGAOKAR, V ;

HALPERIN, BI ;

LANGER, JS .

PHYSICAL REVIEW B-SOLID STATE, 1971, 4 (08) :2612-+

[2]

[Anonymous], J PHYS C SOLID STATE

[3]

Averin D. V., 1991, MESOSCOPIC PHENOMENA

[4] VIRTUAL ELECTRON-DIFFUSION DURING QUANTUM TUNNELING OF THE ELECTRIC CHARGE [J].

AVERIN, DV ;

NAZAROV, YV .

PHYSICAL REVIEW LETTERS, 1990, 65 (19) :2446-2449

[5]

BELOBORODOV IS, CONDMAT0501094

[6] CONDUCTION IN GRANULAR ALUMINUM NEAR THE METAL-INSULATOR-TRANSITION [J].

CHUI, T ;

DEUTSCHER, G ;

LINDENFELD, P ;

MCLEAN, WL .

PHYSICAL REVIEW B, 1981, 23 (11) :6172-6175

[7] Transition from insulating to non-insulating temperature dependence of the conductivity in granular metals [J].

Efetov, KB ;

Tschersich, A .

EUROPHYSICS LETTERS, 2002, 59 (01) :114-120

[8] Quantum percolation in granular metals [J].

Feigel'man, MV ;

Ioselevich, AS ;

Skvortsov, MA .

PHYSICAL REVIEW LETTERS, 2004, 93 (13) :136403-1

[9] Insulator-superconductor transition in 3D granular Al-Ge films [J].

Gerber, A ;

Milner, A ;

Deutscher, G ;

Karpovsky, M ;

Gladkikh, A .

PHYSICAL REVIEW LETTERS, 1997, 78 (22) :4277-4280

[10]

GLAZMAN LI, CONDMAT0501007

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