Volume 133, Number 3, February 2021
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||26 March 2021|
Temperature ranges of the chiral polar smectic phases
1 Faculty of Electrical Engineering, Computer Science and Information Technologies Osijek, J.J. Strossmayera University of Osijek - Kneza Trpimira 2B, 31000 Osijek, Croatia
2 Faculty of Education, University of Ljubljana - 1000 Ljubljana, Slovenia
3 Jožef Stefan Institute - 1000 Ljubljana, Slovenia
Received: 25 November 2020
Accepted: 4 January 2021
The paper presents the analysis of static and dynamic properties of achiral polar smectic doped with chiral dopant. In this system the two phases with equal symmetries exist, the and the phase, which continuously transform one to the other upon temperature changes. The analysis of dynamical properties allowed for the development of the criterion which determines the temperature ranges of the two phases. Besides, the analysis of collective modes revealed that they are either amplitude or phase. However, in many of them the character changes from polar to tilt or vice versa. The collective modes occur in pairs of opposite chiralities. The chiral character of modes explains also the gaps which occur between the amplitude modes.
PACS: 64.70.M- – Transitions in liquid crystals / 77.80.-e – Ferroelectricity and antiferroelectricity
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