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Hybrid Monte Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density.
- Source :
-
Physical Review B . 11/15/2017, Vol. 96 Issue 19, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- We report on Hybrid Monte Carlo simulations at finite spin density of the π-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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 96
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 127973413
- Full Text :
- https://doi.org/10.1103/PhysRevB.96.195408