Negative differential resistance in carbon atomic wire-carbon nanotube junctions

被引：161

作者：

Khoo, Khoong Hong ^{[2
]}

Neaton, J. B. ^{[1
,3
]}

Son, Young Woo ^{[4
,5
]}

Cohen, Marvin L. ^{[2
]}

Louie, Steven G. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept ojPhys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[4] Konkuk Univ, Dept Phys, Seoul 143701, South Korea

[5] Korea Inst Adv Study, Sch Computat Sci, Seoul 130722, South Korea

来源：

NANO LETTERS | 2008年 / 8卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl8017143

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Negative differential resistance (NDR) was recently observed in carbon nanotube junctions just before breaking and hypothesized to arise from the formation of monatomic carbon wires in the junction. Motivated by these results, a first-principles scattering-state approach, based on density functional theory, is used to study the transport properties of carbon chains covalently connecting metallic carbon nanotube leads at finite bias. The I-V characteristics of short carbon chains are predicted to exhibit even-odd behavior, and NDR is found for both even and odd chain junctions in our calculations.

引用

页码：2900 / 2905

页数：6

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