| Autor: |
Dröscher, S., Knowles, H., Meir, Y., Ensslin, K., Ihn, T. |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 84, 7 (2011) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.84.073405 |
| Popis: |
We investigate the density and temperature-dependent conductance of graphene nanoribbons with varying aspect ratio. Transport is dominated by a chain of quantum dots forming spontaneously due to disorder. Depending on ribbon length, electron density, and temperature, single or multiple quan- tum dots dominate the conductance. Between conductance resonances cotunneling transport at the lowest temperatures turns into activated transport at higher temperatures. The density-dependent activation energy resembles the Coulomb gap in a quantitative manner. Individual resonances show signatures of multi-level transport in some regimes, and stochastic Coulomb blockade in others. |
| Databáze: |
arXiv |
| Externí odkaz: |
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