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

This short review article provides the reader with a summary of the history of organic
conductors. To retain a neutral and objective point of view regarding the history …

We study electronic excitations in long polyenes, ie, in one-dimensional strongly correlated
electron systems which are neither infinite nor small. The excitations are described within …

Conjugated polymers have important technological applications, including solar cells and
light emitting devices. They are also active components in many important biological …

This volume concentrates on the controversy within the scientific community over how to
explain, understand and describe the photophysics/photochemistry of this class of materials …

Non-symmorphic materials have recently been predicted to exhibit many different exotic
features in their electronic structures. These originate from forced band degeneracies …

The ground and low-lying states of finite quantum-cell models with one state per site are
obtained exactly through a real-space basis of valence-bond (VB) diagrams that explicitly …

Abstract To the conventional Peierls-Hubbard model, involving both on-site (U) and nearest-
neighbor (V) Coulomb repulsions, we add ''off-diagonal''terms, not expressible purely in …

The influence of electronic correlations on structural and electronic properties of
polyacetylene is studied by adding a Hubbard term (on-site Coulomb coupling U) to the Su …

The photochemistry of rhodopsin and bacterio-rhodopsin has taught us that linear polyenes
can efficiently photoisomerize, even when they are enclosed in well-defined molecular …