Journal
LOW TEMPERATURE PHYSICS
Volume 35, Issue 8-9, Pages 679-686Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3224726
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Funding
- National Academy of Sciences of Ukraine [23/09-N]
- Ukrainian Center for Science and Technology [4119]
- Slovak and Development [APVV-0006-07]
- VEGA [1/0159/09]
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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 quasi-particle 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. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3224726]
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