Quantum criticality and minimal conductivity in graphene with long-range disorder
| dc.creator | Ostrovsky, P. M. | |
| dc.creator | Gornyi, I. V. | |
| dc.creator | Mirlin, A. D. | |
| dc.date | 2007-02-05 | |
| dc.date.accessioned | 2026-07-07T08:10:29Z | |
| dc.date.available | 2026-07-07T08:10:29Z | |
| dc.description | We consider the conductivity $σ_{xx}$ of graphene with negligible intervalley scattering at half filling. We derive the effective field theory, which, for the case of a potential disorder, is a symplectic-class $σ$-model including a topological term with $θ=π$. As a consequence, the system is at a quantum critical point with a universal value of the conductivity of the order of $e^2/h$. When the effective time reversal symmetry is broken, the symmetry class becomes unitary, and $σ_{xx}$ acquires the value characteristic for the quantum Hall transition. | |
| dc.description | 4 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0702115 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0702115 | |
| dc.identifier | Phys. Rev. Lett. 98, 256801 (2007) | |
| dc.identifier | doi:10.1103/PhysRevLett.98.256801 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/131842 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.title | Quantum criticality and minimal conductivity in graphene with long-range disorder | |
| dc.type | text |