Kohn anomaly in graphene

Kohn anomaly in graphene

Symmetry based analysis of the Kohn anomaly is performed. Kohn phonon frequencies and displacements are calculated by force constant method. It is shown that Kohn phonon vibrations cause electronic band gap opening.

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Veröffentlicht in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2011-04, Vol.176 (6), p.510-511
Hauptverfasser: Milošević, I., Kepčija, N., Dobardžić, E., Damnjanović, M., Mohr, M., Maultzsch, J., Thomsen, C.
Format: Artikel
Sprache:eng
Schlagworte:
Anomalies
Electronics
Electron–phonon interaction
Graphene
Kohn anomaly
Materials science
Mathematical analysis
Phonons
Symmetry
Vibration
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Beschreibung
Zusammenfassung:Symmetry based analysis of the Kohn anomaly is performed. Kohn phonon frequencies and displacements are calculated by force constant method. It is shown that Kohn phonon vibrations cause electronic band gap opening.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2010.11.004