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

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


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) [Warsaw University of Technology (PW)]
A. Taube,,
- Politechnika Warszawska
, Anna Łapińska (FP / SRD)
Anna Łapińska,,
- Structural Research Division
, Jarosław Judek (FP / SRD)
Jarosław Judek,,
- Structural Research Division
, Natalia Wochtman (FP / SRD)
Natalia Wochtman,,
- Structural Research Division
, Mariusz Zdrojek (FP / SRD)
Mariusz Zdrojek,,
- Structural Research Division
Journal seriesJournal of Physics D: Applied Physics, ISSN 0022-3727
Issue year2016
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
ASJC Classification2508 Surfaces, Coatings and Films; 3102 Acoustics and Ultrasonics; 3104 Condensed Matter Physics; 2504 Electronic, Optical and Magnetic Materials
URL http://iopscience.iop.org/article/10.1088/0022-3727/49/31/315301/meta
Languageen angielski
taube2016iop.pdf 882.31 KB
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 27-03-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 27-03-2020, ArticleFromJournal
Publication indicators Scopus Citations = 9; WoS Citations = 7; GS Citations = 14.0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.137; WoS Impact Factor: 2016 = 2.588 (2) - 2016=2.747 (5)
Citation count*22 (2020-09-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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