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Title: Infrared and Raman spectroscopy of α-ZrW2O8 : A comprehensive density functional perturbation theory and experimental study

Journal Article · · Journal of Raman Spectroscopy
DOI:https://doi.org/10.1002/jrs.5396· OSTI ID:1501633

We report that cubic zirconium tungstate (α-ZrW2O8), a well-known negative thermal expansion material, has been investigated within the framework of density functional perturbation theory (DFPT), combined with experimental characterization to assess and validate computational results. Using combined Fourier transform infrared measurements and DFPT calculations, new and extensive assignments were made for the far-infrared (<400 cm-1) spectrum of α-ZrW2O8. Lastly, a systematic comparison of DFPT-simulated infrared, Raman, and phonon density-of-state spectra with Fourier transform far-/mid-infrared and Raman data collected in this study, as well as with available inelastic neutron scattering measurements, shows the superior accuracy of the PBEsol exchange-correlation functional over standard PBE calculations for studying the spectroscopic properties of this material.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
AC04-94AL85000; NA0003525
OSTI ID:
1501633
Report Number(s):
SAND-2018-0208J; 659825
Journal Information:
Journal of Raman Spectroscopy, Vol. 49, Issue 8; ISSN 0377-0486
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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