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].

引用

页码：708 / 710

页数：3

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