Influence of epitaxial strain on multiple-mode compounds: The case of SrBi.sub.2./sub.Nb.sub.2./sub.O.sub.9./sub.

0485260 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Petralanda, U. - Hlinka, Jiří - Extebarria, I.
Influence of epitaxial strain on multiple-mode compounds: The case of SrBi₂Nb₂O₉.
Physical Review B. Roč. 96, č. 14 (2017), s. 1-7, č. článku 144112. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR GA15-04121S
Grant ostatní: AV ČR(CZ) PAN-17-04
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: ferroelectrics * thin films * epitaxy * ab-initio methods * phase transitions
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.813, rok: 2017

We study the effect of a tetragonal, symmetry-conserving epitaxial strain on the phase transition sequence and the onset of three symmetry-breaking modes in SrBi2Nb2O9 by first-principles calculations. The interplay of the strain variation of energy expansion coefficients results in an interesting phase diagram which includes proper, hybrid improper, and a different kind of improper ferroelectric phase transitions. The symmetries of the epitaxially stabilized phases and the possible phase-transition sequences are compared with the unstrained case.

Trvalý link: http://hdl.handle.net/11104/0280337