韦小宝在美国《物理评论快报》（PRL）发表第一作者论文

24 01 2010年

【按：为避免重名，一些国际物理期刊允许华人作者在其名字拼音后面加注汉字。有的非华人作者也跟着给自己取一个中文名字。下面的第一作者Victor W. Brar给自己取名“韦小宝”，估计是其华人合作者的杰作。】

http://prl.aps.org/abstract/PRL/v104/i3/e036805

Phys. Rev. Lett. 104, 036805 (2010) [4 pages]

Observation of Carrier-Density-Dependent Many-Body Effects in Graphene via Tunneling Spectroscopy

Abstract

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Victor W. Brar (韦小宝)^1,2, Sebastian Wickenburg (魏烈钢)¹, Melissa Panlasigui¹, Cheol-Hwan Park^1,2, Tim O. Wehling^3,4, Yuanbo Zhang (张远波)¹, Régis Decker^1,2, Çağlar Girit^1,2, Alexander V. Balatsky³, Steven G. Louie^1,2, Alex Zettl^1,2, and Michael F. Crommie^1,2
¹Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
²Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, USA
³Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
⁴1. Institut für Theoretische Physik, Universität Hamburg, D-20355 Hamburg, Germany

Received 4 November 2009; published 22 January 2010

We find the scanning tunneling spectra of backgated graphene monolayers to be significantly altered by many-body excitations. Experimental features in the spectra arising from electron-plasmon interactions show carrier density dependence, distinguishing them from density-independent electron-phonon features. Using a straightforward model, we are able to calculate theoretical tunneling spectra that agree well with our data, providing insight into the effects of many-body interactions on the lifetime of graphene quasiparticles.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.104.036805

DOI:

10.1103/PhysRevLett.104.036805

PACS:

73.22.-f