| Autor: |
Manghi, Franca, Petocchi, Francesco |
| Rok vydání: |
2013 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/0031-8949/89/7/075802 |
| Popis: |
Based on the Cluster Perturbation solution of the Hubbard hamiltonian for a 2-D honeycomb lattice we present quasiparticle band structures of nanoribbons at half filling as a function of the on-site electron-electron repulsion. We show that at moderate values of e-e interaction ribbons with armachair shaped edges exhibit an unexpected semimetallic behavior, recovering the original insulating character only at larger values of $U$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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