This article reviews the static and dynamic properties of spontaneous superstructures
formed by electrons. Representations of such electronic crystals are charge density waves …

The first (so-called) lambda transition in solids was found in the specific heat measurements
for NH4Cl at 242 K by F. Simon in 1922 [Simon (1922). Ann. Phys. 68, 241–280]. Analogous …

We investigated by optical microscopy the propagation of the thermal spin transition in [Fe
(btr) 2 (NCS) 2]· H 2 O·(btr= bis-triazole) single crystals. Using high-quality fresh crystals …

High-resolution X-ray diffraction experiments and state-of-the-art density functional theory
calculations have been performed. The validity of the atoms-in-molecules approach is tested …

Organic charge-transfer (CT) crystals constitute an important class of functional materials,
characterized by the directional charge-transfer interaction between π-electron Donor (D) …

Description of the red and yellow polymorphs of thallium picrate provides the introduction to
this review paper that attempts to set its subject within the framework of classical physical …

The temperature induced neutral to ionic phase transition (TI-NIT) is a rare phenomenon
occurring in mixed stack charge transfer (CT) crystals made up of alternating π-electron …

In this paper, the role of short-range interchain interactions in the temperature-induced
neutral-ionic or valence instability of four charge transfer (CT) crystals (4, 4 …

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 …

Supramolecular ferroelectric cocrystals of phenazine (Phz) with chloranilic acid (H2ca),
bromanilic acid (H2ba), and fluoranilic acid (H2fa) have been characterized by the interplay …