Temperature induced phonon behaviour in germanium selenide thin films probed by Raman spectroscopy

A. Taube , Anna Łapińska , Jarosław Judek , Natalia Wochtman , Mariusz Zdrojek

Abstract

Here we report a detailed study of temperature-dependent phonon properties of exfoliated germanium selenide thin films (several tens of nanometers thick) probed by Raman spectroscopy in the 70-350 K temperature range. The temperature-dependent behavior of the positions and widths of the Raman modes was nonlinear. We concluded that the observed effects arise from anharmonic phonon-phonon interactions and are explained by the phenomenon of optical phonon decay into acoustic phonons. At temperatures above 200 K, the position of the Raman modes tended to be linearly dependent, and the first order temperature coefficients χ were -0.0277, -0.0197 and -0.031 cm-1 K-1 for B 3g, A g(1) and A g(2) modes, respectively. © 2016 IOP Publishing Ltd.
Author A. Taube - Institute of Electron Technology (ITE)
A. Taube,,
-
, Anna Łapińska ZBS
Anna Łapińska,,
- Structural Research Division
, Jarosław Judek ZBS
Jarosław Judek,,
- Structural Research Division
, Natalia Wochtman ZBS
Natalia Wochtman,,
- Structural Research Division
, Mariusz Zdrojek ZBS
Mariusz Zdrojek,,
- Structural Research Division
Journal seriesJournal of Physics D: Applied Physics, ISSN 0022-3727
Issue year2016
Vol49
No315301
Pages315301.1-315301.5
Publication size in sheets0.5
Keywords in EnglishGermanium; Raman spectroscopy; Temperature; Thin films, Acoustic phonons; Anharmonic phonons; Phonon properties; Selenides; Temperature dependent; Temperature dependent behavior; Temperature range; Temperature-induced, Phonons
DOIDOI:10.1088/0022-3727/49/31/315301
URL http://iopscience.iop.org/article/10.1088/0022-3727/49/31/315301/meta
Languageen angielski
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taube2016iop.pdf 882.31 KB
Score (nominal)35
ScoreMinisterial score [Punktacja MNiSW] = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) [Punktacja MNiSW (2013-2016)] = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2016 = 2.588 (2) - 2016=2.747 (5)
Citation count*3 (2018-06-14)
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