Effect of defects on the quasiparticle spectra of graphite and graphene
| Autor: | E. V. Manzheliĭ, Igor Gospodarev, S. B. Feodos’ev, V. I. Grishaev, E. S. Syrkin, Alexander Feher, K. V. Kravchenko |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter::Other Graphene Phonon Dirac (software) General Physics and Astronomy Spectral line law.invention Condensed Matter::Materials Science symbols.namesake law Vacancy defect Dirac equation Physics::Atomic and Molecular Clusters Quasiparticle symbols Condensed Matter::Strongly Correlated Electrons Graphite Physics::Chemical Physics |
| Zdroj: | Low Temperature Physics. 35:679-686 |
| ISSN: | 1090-6517 1063-777X |
| Popis: | It is shown that in graphite the spectral density of phonons polarized along the c axis has a V shaped feature similar to the so-called Dirac singularity characteristic of the electron density of states in graphene. The formation of quasilocal states, which increase the occupation of the quasiparticle levels near this feature, is analyzed from a unified standpoint for the phonon spectrum of metal-intercalated graphite and the electronic spectrum of graphene with vacancies. It is determined that in the electronic spectrum of graphene with an isolated vacancy quasilocal states are characteristic only of atoms belonging to the sublattice that does not contain this vacancy. |
| Databáze: | OpenAIRE |
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