Terahertz response of SrTiO3 based heterostructures: Influence of strain temperature and electric field

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00486580" target="_blank" >RIV/68378271:_____/14:00486580 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1109/IRMMW-THz.2014.6956088" target="_blank" >http://dx.doi.org/10.1109/IRMMW-THz.2014.6956088</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/IRMMW-THz.2014.6956088" target="_blank" >10.1109/IRMMW-THz.2014.6956088</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Terahertz response of SrTiO3 based heterostructures: Influence of strain temperature and electric field

Popis výsledku v původním jazyce

A systematic study of strained SrTiO3/DyScO3 heterostructures was performed using time-domain terahertz spectroscopy in the temperature range from 20 to 294 K. Interdigitated electrodes deposited on top of the structures allowed probing of the terahertz response upon an applied electric field. All studied structures underwent the phase transition close to room temperature. Evolution of the complex dielectric spectra with temperature and electric bias was described by a general model involving a harmonic oscillator (soft mode) coupled to a Debye relaxation (central mode). At high temperatures, the soft mode is responsible for nearly all the changes observed in the spectra with temperature and applied electric field. At low temperatures, deep in the ferroelectric phase, the soft mode significantly hardens and loses its importance for the terahertz dynamics, the central mode becomes stronger and it almost completely determines the shape of the measured spectra.n

Název v anglickém jazyce

Terahertz response of SrTiO3 based heterostructures: Influence of strain temperature and electric field

Popis výsledku anglicky

A systematic study of strained SrTiO3/DyScO3 heterostructures was performed using time-domain terahertz spectroscopy in the temperature range from 20 to 294 K. Interdigitated electrodes deposited on top of the structures allowed probing of the terahertz response upon an applied electric field. All studied structures underwent the phase transition close to room temperature. Evolution of the complex dielectric spectra with temperature and electric bias was described by a general model involving a harmonic oscillator (soft mode) coupled to a Debye relaxation (central mode). At high temperatures, the soft mode is responsible for nearly all the changes observed in the spectra with temperature and applied electric field. At low temperatures, deep in the ferroelectric phase, the soft mode significantly hardens and loses its importance for the terahertz dynamics, the central mode becomes stronger and it almost completely determines the shape of the measured spectra.n

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 39th International Conference on Infrared Millimeter and Terahertz Waves

ISBN

978-147993877-3

ISSN

2162-2027

e-ISSN

—

Počet stran výsledku

2

Strana od-do

—

Název nakladatele

IEEE

Místo vydání

New York

Místo konání akce

Tucson

Datum konání akce

14. 9. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000378889200099