Jukić Dina, Čepič Mojca
Faculty of Electrical Engineering, Computer Science and Information Technologies Osijek, J.J. Strossmayera University of Osijek, 31000 Osijek, Croatia.
Faculty of Education, University of Ljubljana, 1000 Ljubljana, Slovenia and Jožef Stefan Institute, 1000 Ljubljana, Slovenia.
Phys Rev E. 2019 Jun;99(6-1):062705. doi: 10.1103/PhysRevE.99.062705.
The paper presents a detailed analysis of the effects of chiral doping on antiferroelectric B_{2} subphases in bent core systems. The studied system exhibits the phase sequence SmA↔SmAP_{A}↔SmC_{S}P_{A}. The chiral dopant induces the tilt in the SmAP_{A} phase or the tilt modulation in the SmC_{S}P_{A} phase, which is known as the chiroclinic effect, but it also influences the stability ranges and the order of the transition between the phases. The order of the phase transition changes from a continuous for weak effects of chiral doping to discontinuous for strong effects. Competition of interactions results in changes of the phase sequences, which are resumed in the phase diagram. The method that leads to these findings, which could be used for the analysis of other similar systems, is briefly presented as well.
本文详细分析了手性掺杂对弯曲核体系反铁电B₂亚相的影响。所研究的体系呈现出SmA↔SmAPₐ↔SmCₛPₐ的相序。手性掺杂剂会在SmAPₐ相中引起倾斜或在SmCₛPₐ相中引起倾斜调制，这被称为手性倾斜效应，但它也会影响相的稳定范围和相变的顺序。相变顺序从手性掺杂弱效应时的连续变化为强效应时的不连续变化。相互作用的竞争导致相序的变化，这些变化在相图中得以体现。文中还简要介绍了得出这些发现的方法，该方法可用于分析其他类似体系。
