TY  - JOUR
AU  - Wehling, T. O.
AU  - Sasioglu, E.
AU  - Friedrich, C.
AU  - Lichtenstein, A. I.
AU  - Katsnelson, M. I.
AU  - Blügel, S.
TI  - Strength of Effective Coulomb Interactions in Graphene and Graphite
JO  - Physical review letters
VL  - 106
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-15682
SP  - 236805
PY  - 2011
N1  - Financial support by the Deutsche Forschungsgemeinschaft through FOR-912, FOR-1346, SFB 668, SPP 1145, SPP 1459, and FOM (The Netherlands) is acknowledged. T. O. W. is grateful to FZ Julich for hospitality during the visit, when parts of this work were conceived. One of us, S. B., thanks Achim Rosch for fruitful discussions.
AB  - 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 is an element of = 2.5 in very good agreement with experiment.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291399500010
DO  - DOI:10.1103/PhysRevLett.106.236805
UR  - https://juser.fz-juelich.de/record/15682
ER  -