Spectroscopic Studies on Electronic Ferroelectricity in Organic Conductors
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چکیده
Organic conductors exhibit unusual physical properties due to the critical nature of valence electrons fluctuating under localizing and delocalizing regime. Recently, we discovered that an organic superconductor, α-(BEDT-TTF)2I3 [BEDTTTF: bis(ethylenedithio)tetrathiafulvalene], induces optical second-harmonic generation (SHG) along with charge-ordering driven by the repulsive electron-electron interactions.1) The SHG activity proves that the organic complex induces macroscopic electric polarization by the electronic transition. To understand the fundamental and functional properties of such “electronic ferroelectrics,” we are engaged in the material research and development of experimental technique dedicated for low-temperature SHG microscopy of tiny organic crystals.
منابع مشابه
Ferroelectricity and Charge Ordering in Quasi One-Dimensional Organic Conductors Springer series in Physics
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