In conventional ferroelectrics the polarization is induced either by the relative displacement
of positive and negative ions due to a lattice distortion or by the collective alignment of …

Ferroelectrics sometimes show large electro-optical and non-linear optical effects, available
for polarization rotation and frequency conversion of light, respectively. If the amplitude of …

Mixed-stacked organic molecular compounds near the neutral–ionic phase boundary,
represented by tetrathiafulvalene-p-chloranil (TTF-CA), show a unique phase transition from …

A rapid polarization control in paraelectric materials is important for an ultrafast optical
switching useful in the future optical communication. In this study, we applied terahertz …

Although the Neutral-Ionic transition in mixed stack charge-transfer crystals was discovered
almost forty years ago, many features of this intriguing phase transition, as well as open …

Neutral-ionic transitions (NITs) occur in organic charge-transfer (CT) crystals of planar π-
electron donors (D) and acceptors (A) that form mixed stacks... D+ ρ A− ρ D+ ρ A− ρ D+ ρ A …

We review existing manifestations and prospects for ferroelectricity in electronically and
optically active carbon-based materials. The focus point is the proposal for the electronic …

This book discusses the essential properties of carbon nanotubes and 2D graphene
systems. The book focuses on the fundamental excitation properties of a large range of …

Tetrathiafulvalene-p-chloranil exhibits photoinduced phase transition (PIPT) between
neutral (N) and ionic (I) phases, in which the constituent molecules are approximately …

Recent developments in femtosecond laser technology have enabled the generation of a
nearly monocyclic strong terahertz (THz) pulse with an amplitude greater than 100 kV cm− 1 …