Koerner, Michael and Smith, Dominik and Buividovich, Pavel and Ulybyshev, Maksim and von Smekal, Lorenz (2017) Hybrid Monte Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density. PHYSICAL REVIEW B, 96 (19): 195408. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We report on Hybrid Monte Carlo simulations at finite spin density of the p-band electrons in monolayer graphene with realistic interelectron interactions. Unlike simulations at finite charge-carrier density, these are not affected by a fermion-sign problem. Our results are in qualitative agreement with an interaction-induced warping of the Fermi contours and a reduction of the bandwidth as observed in angle-resolved photoemission spectroscopy experiments on charge-doped graphene systems. Furthermore, we find evidence that the neck-disrupting Lifshitz transition, which occurs when the Fermi level traverses the van Hove singularity (VHS), becomes a true quantum phase transition due to interactions. This is in line with an instability of the VHS toward the formation of ordered electronic phases, which has been predicted by a variety of different theoretical approaches.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DOPED GRAPHENE; SUPERCONDUCTIVITY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 28 Feb 2019 10:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1864 |
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