Coulomb Blockade in Graphene Nanodisks
| dc.creator | Ezawa, Motohiko | |
| dc.date | 2007-12-08 | |
| dc.date.accessioned | 2026-07-07T09:31:12Z | |
| dc.date.available | 2026-07-07T09:31:12Z | |
| dc.description | Graphene nanodisk is a graphene derivative with a closed edge. The trigonal zigzag nanodisk with size $N$ has $N$-fold degenerated zero-energy states. We investigate electron-electron interaction effects in the zero-energy sector. We explicitely derive the direct and exchange interactions, which are found to have no SU($N$) symmetry. Then, regarding a nanodisk as a quantum dot with an internal degree of freedom, we analyze the nanodisk-lead system consisting of a nanodisk and two leads. Employing the standard Green function method, we reveal novel Coulomb blockade effects in the system. The occupation number in the nanodisk exhibits a peculiar series of plateaux and dips, reflecting a peculiar structure of energy spectrum of nanodisk without SU($N$) symmetry. Dips are argued to emerge due to a Coulomb correlation effect. | |
| dc.description | 8 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0712.1270 | |
| dc.identifier | http://arxiv.org/abs/0712.1270 | |
| dc.identifier | Physical Review B 77, 155411 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.77.155411 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/158377 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Coulomb Blockade in Graphene Nanodisks | |
| dc.type | text |