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Fizika Tverdogo Tela, 2021 Volume 63, Issue 4, Pages 550–553 (Mi ftt8156)

Surface physics, thin films

On the nature of red shift of the Raman $G$ peak in an epitaxial two-dimensional layer

S. Yu. Davydova, O. V. Posrednikb

a Ioffe Institute, St. Petersburg, Russia
b Saint Petersburg Electrotechnical University "LETI", St. Petersburg, Russia

Abstract: With the use of the model excluded any deformation at the contact of monolayer and substrate role of the interlayer coupling is considered. It is shown that this coupling leads to the increase of the phonons frequencies values. Role of the external pressure and temperature is shortly discussed.

Keywords: force constants, phonons, pressure, temperature.

Received: 06.12.2020
Revised: 06.12.2020
Accepted: 07.12.2020

DOI: 10.21883/FTT.2021.04.50723.253


 English version:
Physics of the Solid State, 2021, 63:4, 530–533

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© Steklov Math. Inst. of RAS, 2024