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Structural, electronic and vibrational properties of LaF3 according to density functional theory and Raman spectroscopy
Автор | A, S Oreshonkov | |
Автор | E, M Roginskii | |
Автор | A, S Krylov | |
Автор | Ершов, А. А. | |
Автор | V, N Voronov | |
Дата внесения | 2019-07-01T07:28:45Z | |
Дата, когда ресурс стал доступен | 2019-07-01T07:28:45Z | |
Дата публикации | 2018-05 | |
Библиографическое описание | A, S Oreshonkov. Structural, electronic and vibrational properties of LaF3 according to density functional theory and Raman spectroscopy [Текст] / S Oreshonkov A, M Roginskii E, S Krylov A, А. А. Ершов, N Voronov V // Journal of Physics Condensed Matter. — 2018. — Т. 30 (№ 25). | |
ISSN | 09538984 | |
URI (для ссылок/цитирований) | http://iopscience.iop.org/article/10.1088/1361-648X/aac452/meta | |
URI (для ссылок/цитирований) | https://elib.sfu-kras.ru/handle/2311/111218 | |
Аннотация | Crystal structure of LaF3 single crystal is refined in tysonite-type trigonal unit cell P c1 using density functional theory calculations and Raman spectroscopy. It is shown that trigonal structure with P c1 space group is more energy-efficient than hexagonal structure with space group P63 cm. Simulated Raman spectra obtained using LDA approximation is in much better agreement with experimental data than that obtained with PBE and PBEsol functionals of GGA. The calculated frequency value of silent mode B 2 in case of hexagonal structure P63 cm was found to be imaginary (unstable mode), thus the energy surface obtains negative curvature with respect to the corresponding normal coordinates of the mode which leads to instability of the hexagonal structure in harmonic approximation. The A 1g line at 214 cm−1 in Raman spectra of LaF3 related to the translation of F2 ions along c axis can be connected with F2 ionic conductivity. | |
Тема | LaF3 | |
Тема | tysonite structure | |
Тема | DFT | |
Тема | electronic structure | |
Тема | lattice vibrations | |
Тема | Raman spectroscopy | |
Название | Structural, electronic and vibrational properties of LaF3 according to density functional theory and Raman spectroscopy | |
Тип | Journal Article | |
Тип | Journal Article Preprint | |
ГРНТИ | 29.31.26 | |
Дата обновления | 2019-07-01T07:28:45Z | |
DOI | 10.1088/1361-648X/aac452 | |
Институт | Институт инженерной физики и радиоэлектроники | |
Институт | Инженерно-строительный институт | |
Подразделение | Кафедра экспериментальной физики и инновационных технологий | |
Подразделение | Кафедра проектирования зданий и экспертизы недвижимости | |
Журнал | Journal of Physics Condensed Matter | |
Квартиль журнала в Scopus | Q1 | |
Квартиль журнала в Web of Science | Q2 |