Conductance Fluctuations and Field Asymmetry of Rectification in Graphene

被引：47

作者：

Ojeda-Aristizabal, C. ^{[1
]}

Monteverde, M. ^{[1
]}

Weil, R. ^{[1
]}

Ferrier, M. ^{[1
]}

Gueron, S. ^{[1
]}

Bouchiat, H. ^{[1
]}

机构：

[1] Univ Paris 11, Phys Solides Lab, CNRS, UMR 8502, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

关键词：

TRANSPORT; COHERENCE;

D O I：

10.1103/PhysRevLett.104.186802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate conductance fluctuations as a function of carrier density n and magnetic field in diffusive mesoscopic samples made from monolayer and bilayer graphene. We show that the fluctuations' correlation energy and field, which are functions of the diffusion coefficient, have fundamentally different variations with n, illustrating the contrast between massive and massless carriers. The field dependent fluctuations are nearly independent of n, but the n-dependent fluctuations are not universal and are largest at the charge neutrality point. We also measure the second-order conductance fluctuations ( mesoscopic rectification). Its field asymmetry, due to electron-electron interaction, decays with conductance, as predicted for diffusive systems.

引用

页数：4

共 27 条

[1]

Akkermans E., 2007, MESOSCOPIC PHYS ELEC

[2]

ALTSHULER BL, 1985, JETP LETT+, V41, P648

[3]

ALTSHULER BL, 1991, MESOSCOPIC PHENOMENA

[4] Magnetic-field asymmetry of mesoscopic dc rectification in Aharonov-Bohm rings [J].

Angers, L. ;

Zakka-Bajjani, E. ;

Deblock, R. ;

Gueron, S. ;

Bouchiat, H. ;

Cavanna, A. ;

Gennser, U. ;

Polianski, M. .

PHYSICAL REVIEW B, 2007, 75 (11)

[5]

BEREZOVSKY J, ARXIV09070428

[6] 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

[7] Random resistor network model of minimal conductivity in graphene [J].

Cheianov, Vadim V. ;

Fal'ko, Vladimir I. ;

Altshuler, Boris L. ;

Aleiner, Igor L. .

PHYSICAL REVIEW LETTERS, 2007, 99 (17)

[8] Gauge-invariant nonlinear electric transport in mesoscopic conductors [J].

Christen, T ;

Buttiker, M .

EUROPHYSICS LETTERS, 1996, 35 (07) :523-528

[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]

Imry Y., 1997, Introduction to Mesoscopic Physics

← 1 2 3 →