A theoretical analysis of field emission from graphene nanoribbons

被引：12

作者：

Mao, Ling-Feng ^{[1
]}

机构：

[1] Soochow Univ, Sch Urban Rail Transportat, Suzhou 215006, Peoples R China

来源：

CARBON | 2011年 / 49卷 / 08期

基金：

中国国家自然科学基金;

关键词：

COHERENCE; PHASE;

D O I：

10.1016/j.carbon.2011.02.061

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The characteristics of field-emission current of a graphene nanoribbon along the direction without finite size effect in the graphene sheet have been theoretically studied. After the work function of graphene nanoribbon is assumed not to change with its width, numerical calculations show that field-emission current density at a given external field decreases with decreasing width of nanoribbon. Such a decrease is especially large when the width of graphene ribbon is a few nanometers. Thus it will lead to an increase in the turn-on electric field. Numerical calculations also show that the effect of the image potential on the field-emission current density decreases with decreased temperature. This implies that to ensure in a workable field-emission device fabricated by graphene nanoribbon, a wider nanoribbon is needed to keep a large field-emission current density. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2709 / 2714

页数：6

共 29 条

[1]

[Anonymous], 2005, MICRODEVICE, DOI 10.1007/b139052

[2] Carbon-based electronics [J].

Avouris, Phaedon ;

Chen, Zhihong ;

Perebeinos, Vasili .

NATURE NANOTECHNOLOGY, 2007, 2 (10) :605-615

[3] Graphene ladder: A model of field emission center on the surface of loose nanocarbon materials [J].

Babenko, A. Yu. ;

Dideykin, A. T. ;

Eidelman, E. D. .

PHYSICS OF THE SOLID STATE, 2009, 51 (02) :435-439

[4] LANDAUER CONDUCTANCE FORMULA AND ITS GENERALIZATION TO FINITE VOLTAGES [J].

BAGWELL, PF ;

ORLANDO, TP .

PHYSICAL REVIEW B, 1989, 40 (03) :1456-1464

[5] Electronic confinement and coherence in patterned epitaxial graphene [J].

Berger, Claire ;

Song, Zhimin ;

Li, Xuebin ;

Wu, Xiaosong ;

Brown, Nate ;

Naud, Cecile ;

Mayou, Didier ;

Li, Tianbo ;

Hass, Joanna ;

Marchenkov, Atexei N. ;

Conrad, Edward H. ;

First, Phillip N. ;

de Heer, Wait A. .

SCIENCE, 2006, 312 (5777) :1191-1196

[6] Carrier statistics and quantum capacitance of graphene sheets and ribbons [J].

Fang, Tian ;

Konar, Aniruddha ;

Xing, Huili ;

Jena, Debdeep .

APPLIED PHYSICS LETTERS, 2007, 91 (09)

[7] Field emission in vacuum micro-electronics [J].

Fursey, GN .

APPLIED SURFACE SCIENCE, 2003, 215 (1-4) :113-134

[8] The rise of graphene [J].

Geim, A. K. ;

Novoselov, K. S. .

NATURE MATERIALS, 2007, 6 (03) :183-191

[9] Bipolar supercurrent in graphene [J].

Heersche, Hubert B. ;

Jarillo-Herrero, Pablo ;

Oostinga, Jeroen B. ;

Vandersypen, Lieven M. K. ;

Morpurgo, Alberto F. .

NATURE, 2007, 446 (7131) :56-59

[10] CALCULATIONS OF RESONANT TUNNELING LEVELS ACROSS ARBITRARY POTENTIAL BARRIERS [J].

HSU, DS ;

HSU, MZ ;

TAN, CH ;

WANG, YY .

JOURNAL OF APPLIED PHYSICS, 1992, 72 (10) :4972-4974

← 1 2 3 →