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Title: First-principles calculations of phonons and Raman spectra in monoclinic CsSnCl 3

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics

Density functional perturbation theory is used here to calculate the phonons at the zone center for monoclinic CsSnCl3. Furthermore, we report the calculated normal mode frequencies classified according to irreducible representations for both infrared-active and Raman-active modes. We also report the dielectric constants and Born-effective charges and investigate the anisotropy of the nonanalyticities near the zone center. The first-principles calculated Raman-active phonon frequencies and simulated Raman spectra are compared with experimental results from literature. We find that aside from the first-order allowed Raman modes of Ag and Bg symmetries, forbidden LO Raman modes appear prominently in the measured spectra. Several of these modes are close to or coincide with allowed modes and alter their intensity, while others appear as separate otherwise unexplained peaks. With this interpretation, good agreement is obtained with experimental mode frequencies to within a few cm-1.

Research Organization:
Case Western Reserve Univ., Cleveland, OH (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0008933; ER-46874-SC0008933
OSTI ID:
1593453
Alternate ID(s):
OSTI ID: 1179977
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 7; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (2)

Phonon order and reststrahlen bands of polar vibrations in crystals with monoclinic symmetry journal January 2019
Phonon order and reststrahlen bands of polar vibrations in crystals with monoclinic symmetry text January 2018

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