Long-range correlations in disordered graphene
| dc.creator | Ziegler, K. | |
| dc.date | 2008-06-03 | |
| dc.date | 2008-09-04 | |
| dc.date.accessioned | 2026-07-07T10:00:11Z | |
| dc.date.available | 2026-07-07T10:00:11Z | |
| dc.description | The appearence of long-range correlations near the Dirac point of a Dirac-like spinor model with random vector potential is studied. These correlations originate from a spontaneously broken symmetry and their corresponding Goldstone modes. Using a strong-disorder expansion, correlation functions and matrix elements are analyzed and compared with results from a weak-disorder expansion. The local density of states correlation and the overlap between states above and below the Dirac point are characterized by a long-range behavior. The correlation range decreases with the distance from the Dirac point. Transport is diffusive and the diffusion coefficient is proportional to the one-particle scattering time for any strength of disorder. A consequence of the special properties of particle-hole scattering is a constant microwave conductivity for weak as well as for strong disorder, describing a deviation from conventional Drude-like transport. Some properties of the model can be linked to a kind of Kondo scale, which is generated by disorder. Finally, the properties of the wave functions at the Dirac point are characterized by their participation ratios, indicating a critical state at the Dirac point. | |
| dc.description | 17 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0806.0540 | |
| dc.identifier | http://arxiv.org/abs/0806.0540 | |
| dc.identifier | Phys. Rev. B 78, 125401 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.125401 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/168260 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Long-range correlations in disordered graphene | |
| dc.type | text |