Effect of step-edge on spectral properties and planar stability of metallic bigraphene

Пористые и низкоразмерные структуры

Автор(и)

  • V.V. Eremenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • V.A. Sirenko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • I.A. Gospodarev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • E.S. Syrkin B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • S.B. Feodosyev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • I.S. Bondar B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Pr. Nauky, Kharkiv 61103, Ukraine
  • S.S. Saxena Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
  • A. Feher Centre of Low Temperature Physics, Faculty of Science, P.J. Šafárik University and Institute of Experimental Physics SAS, 9 Park Angelinum, Košice 041 54, Slovakia
  • K.A. Minakova National Technical University “Kharkiv Polytechnic Institute”, 21 Frunze Str., Kharkov 61002, Ukraine

DOI:

https://doi.org/10.1063/1.4941004%20

Ключові слова:

quasiparticle spectrum, quasi-two-dimensional crystals, graphene, bigraphene.

Анотація

Phonon and electron spectra of metallic bigraphene are analyzed in the presence of step-edge crystal imperfection. Different geometries of step-edge are considered. The dynamic planar stability of the considered structure is proved for temperatures above the ambient. The number of phonon states is shown to grow near the K-point of the first Brillouin zone, compared to pristine graphene. It is found, that this type of defects causes substantially non-uniform distribution of electron states and the pronounced increase in the number of states with energies close to Fermi energy can be expected in electron spectrum of the graphene-based compounds. The performed calculations are in good agreement with inelastic neutron, x-ray and Raman measurements.

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Опубліковано

2015-12-18

Як цитувати

(1)
Eremenko, V.; Sirenko, V.; Gospodarev, I.; Syrkin, E.; Feodosyev, S.; Bondar, I.; Saxena, S.; Feher, A.; Minakova, K. Effect of Step-Edge on Spectral Properties and Planar Stability of Metallic Bigraphene: Пористые и низкоразмерные структуры. Fiz. Nizk. Temp. 2015, 42, 134-141.

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