Photoinduced growth of ferroelectric charge order in organic dimer-mott insulator

K. Itoh, H. Itoh, S. Iwai, M. Naka, S. Ishihara, S. Saito, N. Yoneyama, T. Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publication18th International Conference on Ultrafast Phenomena, UP 2012
DOIs
Publication statusPublished - 2013
Event18th International Conference on Ultrafast Phenomena, UP 2012 - Lausanne, Switzerland
Duration: 2012 Jul 82012 Jul 13

Publication series

NameEPJ Web of Conferences
Volume41
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Conference

Conference18th International Conference on Ultrafast Phenomena, UP 2012
Country/TerritorySwitzerland
CityLausanne
Period12/7/812/7/13

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