Ferroelectric transition of a chiral molecular crystal BINOL2DMSO

Toshihiro Nomura; Takeshi Yajima; Zhuo Yang; Ryosuke Kurihara; Yuto Ishii; Masashi Tokunaga; Yasuhiro H. Matsuda; Yoshimitsu Kohama; Kenta Kimura; Tsuyoshi Kimura

doi:10.7566/JPSJ.91.064702

Ferroelectric transition of a chiral molecular crystal BINOL2DMSO

Materials Science 2022-05-03 v2

Authors: Toshihiro Nomura , Takeshi Yajima , Zhuo Yang , Ryosuke Kurihara , Yuto Ishii , Masashi Tokunaga , Yasuhiro H. Matsuda , Yoshimitsu Kohama , Kenta Kimura , Tsuyoshi Kimura

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Abstract

We report dielectric, thermodynamical, acoustic, and optical properties of a chiral molecular crystal, 1,1'-bi-2-naphthol 2-dimethylsulfoxide (BINOL2DMSO). We find two successive phase transitions at Tc1=190 K and Tc2=125 K. The first transition at Tc1 is characterized by an order-disorder transition of the guest molecules DMSO along with ferroelectricity. At the second transition of Tc2, the crystal structure deforms from tetragonal to monoclinic, leading to domain formation. Low-temperature x-ray diffraction suggests that the space group changes from P4_12_12 (P4_32_12) to P4_1 (P4_3) at Tc1, and down to P112_1 at Tc2.

Keywords

ferroelectric transition chiral molecular crystal binol2dmso phase transitions dielectric properties x-ray diffraction domain formation

Cite

@article{arxiv.2204.01241,
  title  = {Ferroelectric transition of a chiral molecular crystal BINOL2DMSO},
  author = {Toshihiro Nomura and Takeshi Yajima and Zhuo Yang and Ryosuke Kurihara and Yuto Ishii and Masashi Tokunaga and Yasuhiro H. Matsuda and Yoshimitsu Kohama and Kenta Kimura and Tsuyoshi Kimura},
  journal= {arXiv preprint arXiv:2204.01241},
  year   = {2022}
}

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16 pages, 10 figures

Ferroelectric transition of a chiral molecular crystal BINOL2DMSO

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