Dresden 2017 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 3: Focus: Ferroics with Mesoscopic Order
DF 3.4: Vortrag
Montag, 20. März 2017, 10:50–11:10, WIL B321
On the Jahn-Teller ferroelectric transition of GaV4S8 — •Jiri Hlinka — Institute of Physics, Czech Acad. Sci., Prague
Recently, the crystal of GaV4S8, a multiferroic system hosting a skyrmion lattice phase, has been investigated by polarized Raman and IR spectroscopy above and below the ferroelectric phase transition[1]. Phonon spectra were interpreted with the aid of ab initio calculations of the phonon spectra in the ferroelectric phase.
In this contribution, we shall mostly discuss the relevance of Jahn-Teller distortion for the mesoscopic phases and the character of phonon vibrations directly related to the Jahn-Teller distortion.
[1] J. Hlinka, F. Borodavka, I. Rafalovskyi, Z. Docekalova, J. Pokorny, I. Gregora, V. Tsurkan, H. Nakamura, F. Mayr, C. A. Kuntscher, A. Loidl, S. Bordacs, D. Szaller, H.-J. Lee, J. H. Lee, and I. Kezsmarki, Lattice modes and the Jahn-Teller ferroelectric transition of GaV4S8, Phys. Rev. B 94 060104(R) (2016).