Far-infrared reflectivity spectra of nanotwinned GaV4Se8

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F18%3A00005571" target="_blank" >RIV/46747885:24220/18:00005571 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00494656

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/01411594.2018.1510499" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/01411594.2018.1510499</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01411594.2018.1510499" target="_blank" >10.1080/01411594.2018.1510499</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Far-infrared reflectivity spectra of nanotwinned GaV4Se8

Popis výsledku v původním jazyce

GaV4Se8 is one of the lacunar spinel materials able to host magnetic skyrmionic textures. Earlier investigations at temperatures below its Jahn–Teller ferroelectric phase transition disclosed a nanoscale ferroelectric domain separated by 109∘ domain walls. Here, we have investigated the impact of this nanoscale twinning on polar phonon modes. 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. A characteristic spectral feature caused by the nanoscale twinning has been identified. While this feature is not a well-defined geometric resonance, it may still be accessible in experiments.

Název v anglickém jazyce

Far-infrared reflectivity spectra of nanotwinned GaV4Se8

Popis výsledku anglicky

GaV4Se8 is one of the lacunar spinel materials able to host magnetic skyrmionic textures. Earlier investigations at temperatures below its Jahn–Teller ferroelectric phase transition disclosed a nanoscale ferroelectric domain separated by 109∘ domain walls. Here, we have investigated the impact of this nanoscale twinning on polar phonon modes. 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. A characteristic spectral feature caused by the nanoscale twinning has been identified. While this feature is not a well-defined geometric resonance, it may still be accessible in experiments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GC17-11494J" target="_blank" >GC17-11494J: Multiferoické vlastnosti skyrmionových látek</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Phase Transitions

ISSN

0141-1594

e-ISSN

—

Svazek periodika

91

Číslo periodika v rámci svazku

9-10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

942-952

Kód UT WoS článku

000446595600004

EID výsledku v databázi Scopus

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