Current-voltage curves of gold quantum point contacts revisited

被引：80
作者：
Hansen, K [1 ]
Nielsen, SK
Brandbyge, M
Lægsgaard, E
Stensgaard, I
Besenbacher, F
机构：
[1] Aarhus Univ, CAMP, DK-8000 Aarhus C, Denmark
[2] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark
[3] Tech Univ Denmark, MIC, DK-2800 Lyngby, Denmark
来源：
APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 05期
关键词：
D O I：
10.1063/1.127093
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present measurements of current-voltage (I-V) curves on gold quantum point contacts (QPCs) with a conductance up to 4 G(0) (G(0) = 2e(2)/h is the conductance quantum) and voltages up to 2 V. The QPCs are formed between the gold tip of a scanning tunneling microscope and a Au(110) surface under clean ultra-high-vacuum conditions at room temperature. The I - V curves are found to he almost linear in contrast to previous reports. Tight-binding calculations of I - V curves for one- and two-atom contacts are in excellent agreement with our measurements. On the other hand, clearly nonlinear I - V curves are only observed when the sample has been cleaned in air. (C) 2000 American Institute of Physics. [S0003-6951(00)02530-4].
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页码：708 / 710
页数：3
相关论文
共 16 条
[1]   Properties of nanowires in air -: Controlled values of conductance [J].
Abellán, J ;
Chicón, R ;
Arenas, A .
SURFACE SCIENCE, 1998, 418 (03) :493-501
[2]   Conduction channels at finite bias in single-atom gold contacts [J].
Brandbyge, M ;
Kobayashi, N ;
Tsukada, M .
PHYSICAL REVIEW B, 1999, 60 (24) :17064-17070
[3]  
Costa-Kramer JL, 1998, NATO ADV SCI I E-APP, V348, P1
[4]   Conductance quantization in nanowires formed between micro and macroscopic metallic electrodes [J].
CostaKramer, JL ;
Garcia, N ;
GarciaMochales, P ;
Serena, PA ;
Marques, MI ;
Correia, A .
PHYSICAL REVIEW B, 1997, 55 (08) :5416-5424
[5]   CONTACT ADHESION OF THIN GOLD-FILMS ON ELASTOMERIC SUPPORTS - COLD WELDING UNDER AMBIENT CONDITIONS [J].
FERGUSON, GS ;
CHAUDHURY, MK ;
SIGAL, GB ;
WHITESIDES, GM .
SCIENCE, 1991, 253 (5021) :776-778
[6]   Differential conductance in atomic-scale metallic contacts [J].
García-Martín, A ;
López-Ciudad, T ;
Torres, JA ;
Caamaño, AJ ;
Pascual, JI ;
Sáenz, JJ .
ULTRAMICROSCOPY, 1998, 73 (1-4) :199-203
[7]   Fast and accurate current-voltage curves of metallic quantum point contacts [J].
Hansen, K ;
Nielsen, SK ;
Lægsgaard, E ;
Stensgaard, I ;
Besenbacher, F .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2000, 71 (04) :1793-1803
[8]  
HANSEN K, 2000, THESIS U AARHUS
[9]   Bias dependence of the conductance of Au nanocontacts [J].
Itakura, K ;
Yuki, K ;
Kurokawa, S ;
Yasuda, H ;
Sakai, A .
PHYSICAL REVIEW B, 1999, 60 (15) :11163-11170
[10]   Fabrication of quantum devices by Angstrom-level manipulation of nanoparticles with an atomic force microscope [J].
Junno, T ;
Carlsson, SB ;
Xu, HQ ;
Montelius, L ;
Samuelson, L .
APPLIED PHYSICS LETTERS, 1998, 72 (05) :548-550
12