Photoinduced Growth of Ferroelectric Charge Order in Organic Dimer-Mott insulator
1 Department of Physics, Tohoku University, Sendai 980-8578, Japan
2 JST, CREST, Sendai 980-8578, Japan
3 National Institute of Information and Communications Technology, Koganei, 184-8795, Japan
4 Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
a e-mail: firstname.lastname@example.org
Layered triangular organic dimer Mott (DM) insulator κ-(ET)2Cu2(CN)3 was shown to exhibit a relaxor-like dielectric anomaly below 40 K with strong dispersion relation, reflecting its electric dipole glass (ferroelectric charge order; FCO) nature[1, 2]. The dielectric anomaly in κ-(ET)2Cu2(CN)3 indicates that this compound is located in the vicinity of the DM-FCO phase boundary, where ferroelectric fluctuation such as the electric dipole glass state or the polar cluster is formed in the DM phase. Optical excitation of the DM-FCO competing state by an ultrashort light pulse enables us to achieve dramatic responses, such as photoinduced ferroelectricity, photoinduced growth of the electric dipole glass or the polar clusters.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.