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000015682 0247_ $$2DOI$$a10.1103/PhysRevLett.106.236805
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000015682 084__ $$2WoS$$aPhysics, Multidisciplinary
000015682 1001_ $$0P:(DE-HGF)0$$aWehling, T. O.$$b0
000015682 245__ $$aStrength of Effective Coulomb Interactions in Graphene and Graphite
000015682 260__ $$aCollege Park, Md.$$bAPS$$c2011
000015682 300__ $$a236805
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000015682 440_0 $$04925$$aPhysical Review Letters$$v106$$x0031-9007$$y23
000015682 500__ $$3POF3_Assignment on 2016-02-29
000015682 500__ $$aFinancial support by the Deutsche Forschungsgemeinschaft through FOR-912, FOR-1346, SFB 668, SPP 1145, SPP 1459, and FOM (The Netherlands) is acknowledged. T. O. W. is grateful to FZ Julich for hospitality during the visit, when parts of this work were conceived. One of us, S. B., thanks Achim Rosch for fruitful discussions.
000015682 520__ $$aTo 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.
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000015682 7001_ $$0P:(DE-Juel1)VDB63896$$aSasioglu, E.$$b1$$uFZJ
000015682 7001_ $$0P:(DE-Juel1)VDB418$$aFriedrich, C.$$b2$$uFZJ
000015682 7001_ $$0P:(DE-HGF)0$$aLichtenstein, A. I.$$b3
000015682 7001_ $$0P:(DE-HGF)0$$aKatsnelson, M. I.$$b4
000015682 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b5$$uFZJ
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000015682 8567_ $$uhttp://dx.doi.org/10.1103/PhysRevLett.106.236805
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