Observation of a discontinuous transition from strong to weak localization in 1D granular metal wires

被引：56

作者：

Herzog, AV ^{[1
]}

Xiong, P ^{[1
]}

Sharifi, F ^{[1
]}

Dynes, RC ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.76.668

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the transition from strong to weak localization in in situ grown granular metal wires of Sn, Pb, Pb0.85Bi0.15,Ag, and Au with widths as small as 400 Angstrom. In our wires we observe a transition dramatically different from that seen in 2D films. The wires exhibit an abrupt drop in resistance as large as 4 orders of magnitude. Within this resistance ''gap'' no stable wire is observed. We speculate that we are observing a first order electronic phase transition between the strongly localized and weakly localized states.

引用

收藏

页码：668 / 671

页数：4

相关论文

共 20 条

[1] SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].

ABRAHAMS, E ;

ANDERSON, PW ;

LICCIARDELLO, DC ;

RAMAKRISHNAN, TV .

PHYSICAL REVIEW LETTERS, 1979, 42 (10) :673-676

[2] TUNNELING INTO GRANULAR PH FILMS IN THE SUPERCONDUCTING AND INSULATING REGIMES [J].

BARBER, RP ;

MERCHANT, LM ;

LAPORTA, A ;

DYNES, RC .

PHYSICAL REVIEW B, 1994, 49 (05) :3409-3412

[3] LOW-FIELD MAGNETORESISTANCE IN GRANULAR PB FILMS NEAR THE INSULATOR-SUPERCONDUCTOR TRANSITION [J].

BARBER, RP ;

DYNES, RC .

PHYSICAL REVIEW B, 1993, 48 (14) :10618-10621

[4] NON-METALLIC CONDUCTION IN THIN METAL-FILMS AT LOW-TEMPERATURES [J].

DOLAN, GJ ;

OSHEROFF, DD .

PHYSICAL REVIEW LETTERS, 1979, 43 (10) :721-724

[5] 2-DIMENSIONAL ELECTRICAL-CONDUCTIVITY IN QUENCH-CONDENSED METAL-FILMS [J].

DYNES, RC ;

GARNO, JP ;

ROWELL, JM .

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

[6] APPARENT DESTRUCTION OF SUPERCONDUCTIVITY IN THE DISORDERED ONE-DIMENSIONAL LIMIT [J].

GRAYBEAL, JM ;

MANKIEWICH, PM ;

DYNES, RC ;

BEASLEY, MR .

PHYSICAL REVIEW LETTERS, 1987, 59 (23) :2697-2700

[7] OBSERVATION OF A WELL-DEFINED TRANSITION FROM WEAK TO STRONG LOCALIZATION IN 2-DIMENSIONS [J].

HSU, SY ;

VALLES, JM .

PHYSICAL REVIEW LETTERS, 1995, 74 (12) :2331-2334

[8]

Ishii K., 1973, Progress of Theoretical Physics Supplement, P77, DOI 10.1143/PTPS.53.77

[9] DISORDERED ELECTRONIC SYSTEMS [J].

LEE, PA ;

RAMAKRISHNAN, TV .

REVIEWS OF MODERN PHYSICS, 1985, 57 (02) :287-337

[10] CONSTANCY OF MINIMUM METALLIC CONDUCTIVITY IN 2 DIMENSIONS [J].

LICCIARDELLO, DC ;

THOULESS, DJ .

PHYSICAL REVIEW LETTERS, 1975, 35 (21) :1475-1478