Is graphene in vacuum an insulator?
| dc.creator | Drut, Joaquín E. | |
| dc.creator | Lähde, Timo A. | |
| dc.date | 2008-07-05 | |
| dc.date | 2009-01-15 | |
| dc.date.accessioned | 2026-07-07T12:29:23Z | |
| dc.date.available | 2026-07-07T12:29:23Z | |
| dc.description | We present evidence, from Lattice Monte Carlo simulations of the phase diagram of graphene as a function of the Coulomb coupling between quasiparticles, that graphene in vacuum is likely to be an insulator. We find a semimetal-insulator transition at $α_g^\text{crit} = 1.11 \pm 0.06$, where $α_g^{} \simeq 2.16$ in vacuum, and $α_g^{} \simeq 0.79$ on a SiO$_2^{}$ substrate. Our analysis uses the logarithmic derivative of the order parameter, supplemented by an equation of state. The insulating phase disappears above a critical number of four-component fermion flavors $4 < N_f^{\text{crit}} < 6$. Our data are consistent with a second-order transition. | |
| dc.description | 4 pages, 3 figures, published version | |
| dc.identifier | https://arxiv.org/abs/0807.0834 | |
| dc.identifier | http://arxiv.org/abs/0807.0834 | |
| dc.identifier | Phys. Rev. Lett. 102, 026802 (2009) | |
| dc.identifier | doi:10.1103/PhysRevLett.102.026802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215860 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | Is graphene in vacuum an insulator? | |
| dc.type | text |