Impurity induced Dirac point smearing in graphene
It is shown that in a two-dimensional system with the linear dispersion a resonance is present in the Dirac point vicinity, when the impurity perturbation magnitude exceeds the bandwidth. The corresponding spectrum rearrangement, which follows at a certain critical impurity concentration, results...
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| Datum: | 2007 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2007
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| Schriftenreihe: | Физика низких температур |
| Schlagworte: | |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/120932 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Impurity induced Dirac point smearing in graphene / Yu.V. Skrypnyk, V.M. Loktev // Физика низких температур. — 2007. — Т. 33, № 9. — С. 1002–1007. — Бібліогр.: 19 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | It is shown that in a two-dimensional system with the linear dispersion a resonance is present in the Dirac
point vicinity, when the impurity perturbation magnitude exceeds the bandwidth. The corresponding spectrum
rearrangement, which follows at a certain critical impurity concentration, results in the square root dependence
of the concentration smearing region width on the concentration. If the perturbation magnitude
does not exceed the bandwidth, or the critical concentration is not reached, the concentration smearing region
width remains exponentially small. |
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