IS THE OBSERVED QUANTIZED CONDUCTANCE ON SMALL CONTACTS DUE TO COHERENT BALLISTIC TRANSPORT

被引：14

作者：

ESCAPA, L ^{[1
]}

GARCIA, N ^{[1
]}

机构：

[1] UNIV WATERLOO,DEPT APPL MATH,WATERLOO N2L 3G1,ONTARIO,CANADA

来源：

APPLIED PHYSICS LETTERS | 1990年 / 56卷 / 10期

关键词：

D O I：

10.1063/1.102623

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter revises the interpretation of recent experiments showing quantized conductance on GaAs/GaAlAs constrictions or point contacts in terms of coherent ballistic and sequential transport. Our calculations show by using a first iterative self-consistent procedure that the experimental data can also be reconciled with sequential transport. The mean free path concept in the constriction is discussed in comparison with that of the reservoirs. We conclude that, for the higher modes, the former is much smaller than the latter, implying that in the constriction the transport may be sequential.

引用

页码：901 / 903

页数：3

共 16 条

[1] GENERALIZED MANY-CHANNEL CONDUCTANCE FORMULA WITH APPLICATION TO SMALL RINGS [J].

BUTTIKER, M ;

IMRY, Y ;

LANDAUER, R ;

PINHAS, S .

PHYSICAL REVIEW B, 1985, 31 (10) :6207-6215

[2] ROLE OF QUANTUM COHERENCE IN SERIES RESISTORS [J].

BUTTIKER, M .

PHYSICAL REVIEW B, 1986, 33 (05) :3020-3026

[3]

BUTTIKER M, UNPUB

[4] ON THE BALLISTIC CONDUCTANCE OF SMALL CONTACTS AND ITS RESONANT STRUCTURE - TRUMPET EFFECT WASHES OUT RESONANT STRUCTURE [J].

ESCAPA, L ;

GARCIA, N .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (11) :2125-2129

[5] ELASTIC OSCILLATORY RESISTANCES OF SMALL CONTACTS [J].

GARCIA, N ;

ESCAPA, L .

APPLIED PHYSICS LETTERS, 1989, 54 (15) :1418-1420

[6]

GARCIA N, 1987, STM WORKSHOP

[7] TRANSITION FROM THE TUNNELING REGIME TO POINT CONTACT STUDIED USING SCANNING TUNNELING MICROSCOPY [J].

GIMZEWSKI, JK ;

MOLLER, R .

PHYSICAL REVIEW B, 1987, 36 (02) :1284-1287

[8] CONDUCTANCE OSCILLATIONS IN TWO-DIMENSIONAL SHARVIN POINT CONTACTS [J].

HAANAPPEL, EG ;

VANDERMAREL, D .

PHYSICAL REVIEW B, 1989, 39 (08) :5484-5487

[9] THEORY OF THE CONDUCTANCE OF BALLISTIC QUANTUM CHANNELS [J].

KIRCZENOW, G .

SOLID STATE COMMUNICATIONS, 1988, 68 (08) :715-718

[10] DIRECT MEASUREMENT OF POTENTIAL STEPS AT GRAIN-BOUNDARIES IN THE PRESENCE OF CURRENT FLOW [J].

KIRTLEY, JR ;

WASHBURN, S ;

BRADY, MJ .

PHYSICAL REVIEW LETTERS, 1988, 60 (15) :1546-1549

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