2011/01/12 by G. Gómez-Santos, Tobias Stauber, T. Stauber · 64 citations
Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Doping #Electron #Electronic structure #Friedel oscillations #Graphene #Graphene research and applications #Lattice (music) #Paramagnetism #Physics #Quantum and electron transport phenomena #Quantum mechanics #Tight binding #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.106.045504
published in Physical Review Letters 106(4), 045504 (American Physical Society) · 4+ pages, 1 figure
arxiv created 2011/01/12 · openalex publication_date 2011/01/27 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.