Work

Strength of Effective Coulomb Interactions in Graphene and Graphite

Year: 2011

Type: article

Abstract: To obtain an effective many-body model of graphene and related materials from first principles we calculate the partially screened frequency dependent Coulomb interaction. In graphene, the effective on-site (Hubbard) interaction is U(00)=9.3 eV in close vicinity to the critical value separating conducting graphene from an insulating phase emphasizing the importance of nonlocal Coulomb terms. The nearest-neighbor Coulomb interaction strength is computed to U(01)=5.5 eV. In the long-wavelength limit, we find the effective background dielectric constant of graphite to be ϵ=2.5 in very good agreement with experiment.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.106.236805

Authors: T. O. Wehling, E. Şaşıoğlu, C. Friedrich, A. I. Lichtenstein, M. I. Katsnelson, S. Blügel

Institutions: Universität Hamburg, Forschungszentrum Jülich, Jülich Aachen Research Alliance, Radboud University Nijmegen

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2044613866

FWCI: 18.58

Cites: 40

Cited by: 545

Related to: 10