CROSSOVER PHENOMENON FOR HOPPING CONDUCTION IN STRONG MAGNETIC-FIELDS

被引：48

作者：

SHLIMAK, I

KAVEH, M

YOSEFIN, M

LEA, M

FOZOONI, P

机构：

[1] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL

[2] UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT PHYS,EGHAM TW20 0EX,SURREY,ENGLAND

[3] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.68.3076

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We find that strong magnetic fields reduce the effectiveness of the Coulomb gap in determining the variable-range-hopping (VRH) resistivity-rho. We propose a crossover phenomenon characterized by a temperature T(c), with the Coulomb gap affecting the VRH resistivity only below T(c). The value of T(c) decreases as the magnetic field increases. Our theoretical model explains the observed crossover from a ln-rho(H = 0) is-proportional-to T-1/2 law to a ln-rho(H) is-proportional-to [T0(H)/T]1/3 law with T0 is-proportional-to H.

引用

页码：3076 / 3079

页数：4

共 22 条

[1]

Agrinskaya N. V., 1989, Soviet Physics - Solid State, V31, P1996

[2]

AZBEL M, 1990, PHYS REV B, V43, P2435

[3] VARIABLE-RANGE HOPPING AND COULOMB GAP IN INDIUM-PHOSPHIDE [J].

BISKUPSKI, G ;

DUBOIS, H ;

BRIGGS, A .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (02) :333-338

[4] COULOMB GAP AND LOW-TEMPERATURE CONDUCTIVITY OF DISORDERED SYSTEMS [J].

EFROS, AL ;

SHKLOVSKII, BI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (04) :L49-L51

[5] TRANSPORT STUDIES OF LA2-XSRXCUO4 NEAR THE INSULATOR-METAL-SUPERCONDUCTOR TRANSITION [J].

ELLMAN, B ;

JAEGER, HM ;

KATZ, DP ;

ROSENBAUM, TF ;

COOPER, AS ;

ESPINOSA, GP .

PHYSICAL REVIEW B, 1989, 39 (13) :9012-9016

[6] IMPURITY CONDUCTION IN TRANSMUTATION-DOPED P-TYPE GERMANIUM [J].

FRITZSCHE, H ;

CUEVAS, M .

PHYSICAL REVIEW, 1960, 119 (04) :1238-1245

[7]

GLUKHOV AM, 1986, FIZ TVERD TELA, V28, P583

[8]

IMRY Y, 1982, P TANIGUCHI S

[9]

KNOTEK ML, 1972, J NONCRYST SOLIDS, V8, P10

[10]

KNOTEK ML, 1974, PHYS REV B, V9, P644

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