Far-infrared reflectivity spectra of nanotwinned GaV.sub.4./sub.Se.sub.8./sub.

0494656 - FZÚ 2019 RIV GB eng J - Článek v odborném periodiku
Dočekalová, Zuzana - Márton, Pavel - Ondrejkovič, Petr - Hlinka, Jiří
Far-infrared reflectivity spectra of nanotwinned GaV₄Se₈.
Phase Transitions. Roč. 91, č. 9-10 (2018), s. 942-952. ISSN 0141-1594. E-ISSN 1029-0338
Grant CEP: GA ČR GC17-11494J
Institucionální podpora: RVO:68378271
Klíčová slova: Lacunar spinel * dielectric spectrum * phonons * domain structures * effective medium * ferroelectricity * reflectivity spectroscopy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.026, rok: 2018

We report dielectric and reflectivity spectra of GaV4Se8 crystal in the phonon frequency region, derived from the ab initio predicted phonon frequencies, eigenvectors and Born-effective charges. Reflectivity spectra of the nanotwinned crystal, calculated using exact expressions for the effective macroscopic dielectric response of a perfect regular twin, are compared with the predicted reflectivity spectra of single-domain crystal.
Trvalý link: http://hdl.handle.net/11104/0287762