Modeling extended contacts for nanotube and graphene devices

被引：65

作者：

Nemec, Norbert ^{[1
,2
]}

Tomanek, David ^{[2
,3
]}

Cuniberti, Gianaurelio ^{[2
,4
,5
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

[5] Tech Univ Dresden, Max Bergmann Ctr Biomat, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.77.125420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carrier injection into carbon nanotubes and graphene nanoribbons, contacted by a metal coating over an arbitrary length, is studied by various means: Minimal models allow for exact analytic solutions, which can be transferred to the original system with high precision. Microscopic ab initio calculations of the electronic structure at the carbon-metal interface allow us to extract-for Ti and Pd as contacting materials-realistic parameters, which are then used in large scale tight-binding models for transport calculations. The results are shown to be robust against nonepitaxially grown electrodes and general disorder at the interface, as well as various refinements of the model.

引用

页数：12