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Title: Vacancy-induced nanoscale phase separation in K xFe 2–ySe₂ single crystals evidenced by Raman scattering and powder x-ray diffraction

Abstract

Polarized Raman scattering spectra of K xFe 2–ySe₂ were analyzed in terms of peculiarities of both I4/m and I4/mmm space group symmetries. The presence of the Raman active modes from both space group symmetries (16 Raman-active modes of the I4/m phase and two Raman-active modes of the I4/mmm phase) confirmed the existence of two crystallographic domains with different space group symmetry in a K xFe 2–ySe₂ sample. High-resolution synchrotron powder x-ray diffraction structural refinement of the same sample confirmed the two-phase description, and determined the atomic positions and occupancies for both domains.

Authors:
; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1103079
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Volume: 86 Journal Issue: 5; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Lazarević, N., Abeykoon, M., Stephens, P. W., Lei, Hechang, Bozin, E. S., Petrovic, C., and Popović, Z. V. Vacancy-induced nanoscale phase separation in KxFe2–ySe₂ single crystals evidenced by Raman scattering and powder x-ray diffraction. United States: N. p., 2012. Web. doi:10.1103/PhysRevB.86.054503.
Lazarević, N., Abeykoon, M., Stephens, P. W., Lei, Hechang, Bozin, E. S., Petrovic, C., & Popović, Z. V. Vacancy-induced nanoscale phase separation in KxFe2–ySe₂ single crystals evidenced by Raman scattering and powder x-ray diffraction. United States. doi:10.1103/PhysRevB.86.054503.
Lazarević, N., Abeykoon, M., Stephens, P. W., Lei, Hechang, Bozin, E. S., Petrovic, C., and Popović, Z. V. Mon . "Vacancy-induced nanoscale phase separation in KxFe2–ySe₂ single crystals evidenced by Raman scattering and powder x-ray diffraction". United States. doi:10.1103/PhysRevB.86.054503.
@article{osti_1103079,
title = {Vacancy-induced nanoscale phase separation in KxFe2–ySe₂ single crystals evidenced by Raman scattering and powder x-ray diffraction},
author = {Lazarević, N. and Abeykoon, M. and Stephens, P. W. and Lei, Hechang and Bozin, E. S. and Petrovic, C. and Popović, Z. V.},
abstractNote = {Polarized Raman scattering spectra of KxFe2–ySe₂ were analyzed in terms of peculiarities of both I4/m and I4/mmm space group symmetries. The presence of the Raman active modes from both space group symmetries (16 Raman-active modes of the I4/m phase and two Raman-active modes of the I4/mmm phase) confirmed the existence of two crystallographic domains with different space group symmetry in a KxFe2–ySe₂ sample. High-resolution synchrotron powder x-ray diffraction structural refinement of the same sample confirmed the two-phase description, and determined the atomic positions and occupancies for both domains.},
doi = {10.1103/PhysRevB.86.054503},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 5,
volume = 86,
place = {United States},
year = {2012},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevB.86.054503

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Cited by: 31 works
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