Strong optical nonlinearity and its ultrafast response associated with electron ferroelectricity in an organic conductor

Kaoru Yamamoto, Shinichiro Iwai, Sergiy Boyko, Akimitsu Kashiwazaki, Fukiko Hiramatsu, Chie Okabe, Nobuyuki Nishi, Kyuya Yakushi

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

We report experimental evidence for the generation of ferroelectric polarization in an organic conductor α-[bis(ethylenedithio) tetrathiafulvalene]2I3 obtained by optical second-harmonic generation. The spontaneous polarization emerges along with a metal-to-insulator transition that is driven by the Wigner crystallization of electrons. The strong optical nonlinearity and its ultrafast photoresponse demonstrated by this study exemplify the nature of the ferroelectric polarization that originates from the electron ordering.

Original languageEnglish
Article number074709
Journaljournal of the physical society of japan
Volume77
Issue number7
DOIs
Publication statusPublished - 2008 Jul

Keywords

  • Charge ordering
  • Ferroelectricity
  • Nonlinear optics
  • Organic conductor
  • Second-harmonic generation
  • Strong correlation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Strong optical nonlinearity and its ultrafast response associated with electron ferroelectricity in an organic conductor'. Together they form a unique fingerprint.

Cite this