Measurable lattice effects on the charge and magnetic response in graphene
Entity
UAM. Departamento de Física de la Materia CondensadaDate
2011-01-27Citation
10.1103/PhysRevLett.106.045504
Physical Review Letters 106.4 (2011): 045504
ISSN
0031-9007 (print); 1079-7114 (online)DOI
10.1103/PhysRevLett.106.045504Funded by
This work has been supported by FCT under Grant No. PTDC/ FIS/101434/2008 and MIC under Grant No. FIS2010- 21883-C02-02Project
Gobierno de España. FIS2010-21883-C02-02Editor's Version
http://dx.doi.org/10.1103/PhysRevLett.106.045504Subjects
FísicaRights
© 2011 American Physical SocietyAbstract
The simplest tight-binding model is used to study lattice effects on two properties of doped graphene: (i) magnetic orbital susceptibility and (ii) regular Friedel oscillations, both suppressed in the usual Dirac cone approximation. (i) An exact expression for the tight-binding magnetic susceptibility is obtained, leading to orbital paramagnetism in graphene for a wide range of doping levels which is relevant when compared with other contributions. (ii) Friedel oscillations in the coarse-grained charge response are considered numerically and analytically and an explicit expression for the response to lowest order in lattice effects is presented, showing the restoration of regular 2d behavior, but with strong sixfold anisotropy
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Google Scholar:Gómez Santos, Guillermo
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Stauber, Tobias
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