Ferroelectricity results from one of the most representative phase transitions in solids, and is
widely used for technical applications. However, observations of ferroelectricity in organic …

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 …

Shift current is a steady-state photocurrent generated in non-centrosymmetric single crystals
and has been considered to be one of the major origins of the bulk photovoltaic effect. The …

We present a joint theoretical and experimental work aimed to understand the spectroscopic
behavior of multipolar dyes of interest for nonlinear optics (NLO) applications. In particular …

Ferroelectric polarization of 6.3 μ C cm-2 is induced by the neutral-to-ionic transition, upon
which nonpolar molecules of electron donor tetrathiafulvalene (TTF) and acceptor p …

When an organic semiconductor (OSC) is blended with an electron acceptor molecule that
can act as a p-type dopant, there should ideally be complete (integer) transfer of charge from …

We propose a new approach to study quantum phase transitions in low-dimensional lattice
models. It is based on studying the von Neumann entropy of two neighboring central sites in …

We show by means of ab initio calculations that the organic molecular crystal TTF-CA is
multiferroic: it has an instability to develop spontaneously both ferroelectric and magnetic …

Quantum phase transition achieved by fine tuning the continuous phase transition down to
zero kelvin is a challenge for solid state science. Critical phenomena distinct from the effects …

Neutral–ionic (NI) phase transition is a reversible switching of organic charge-transfer
complexes between distinct valence states by external stimuli. This phase transformation in …