Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2000-11-02
Phys. Rev. Lett. 86, 3048 (2001)
Physics
Condensed Matter
Soft Condensed Matter
10 pages, 5 figures, submitted to PRL
Scientific paper
10.1103/PhysRevLett.86.3048
The ferroelectric (Sm C$^*$) -- antiferroelectric (Sm C$^*_A$) -- reentrant ferroelectric (re Sm C$^*$) phase temperature sequence was observed for system with competing synclinic - anticlinic interactions. The basic properties of this system are as follows (1) the Sm C$^*$ phase is metastable in temperature range of the Sm C$^*_A$ stability (2) the double inversions of the helix handedness at Sm C$^*$ -- Sm C$^*_A$ and Sm C$^*_A$% -- re-Sm C$^*$ phase transitions were found (3) the threshold electric field that is necessary to induce synclinic ordering in the Sm C$^*_A$ phase decreases near both Sm C$^*_A$ -- Sm C$^*$ and Sm C$^*_A$ -- re-Sm C$^*$ phase boundaries, and it has maximum in the middle of the Sm C$^*_A$ stability region. All these properties are properly described by simple Landau model that accounts for nearest neighboring layer steric interactions and quadrupolar ordering only.
Cepic Mojca
Gorecka Ewa
Kardas D.
Mieczkowski Josef
Pociecha Damian
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