Theory of triangular lattice quasi-one-dimensional charge-transfer solids

Pattern of charge ordering in quasi-one-dimensional organic charge-transfer solids

We examine two recently proposed models of charge ordering ~CO! in the nominally 1 4 -filled, quasi-onedimensional ~1D! organic charge-transfer solids ~CTS!. The two models are characterized by site charge density ‘‘cartoons’’ . . . 1010 . . . and . . . 1100 . . . , respectively. We use the Peierls-extended Hubbard model to incorporate both electron-electron (e-e) and electron-phonon (e-ph) int...

Charge-Ordering Phenomena in One-Dimensional Solids

As the dimensionality is reduced, the world becomes more and more interesting; novel and fascinating phenomena show up which call for understanding. Physics in one dimension is a fascinating topic for theory and experiment: for the former often a simplification, for the latter always a challenge. Various ways will be demonstrated how one-dimensional structures can be achieved in reality. In par...

Surface characterization and surface electronic structure of organic quasi-one- dimensional charge transfer salts

Ferroelectricity and Charge Ordering in Quasi One-Dimensional Organic Conductors

The family of molecular conductors TMTTF/TMTSF-X demonstrates almost all known electronic phases in parallel with a set of weak structural modifications of ‘anion ordering’ and mysterious ‘structureless’ transitions. Only in early 2000s their nature became elucidated by discoveries of a huge anomaly in the dielectric permittivity and by the NMR evidences for the charge ordering (disproportionat...

Topological charge pumping in a one-dimensional optical lattice.

A topological charge pump transfers charge in a quantized fashion. The quantization is stable against the detailed form of the pumping protocols and external noises and shares the same topological origin as the quantum Hall effect. We propose an experimental setup to realize topological charge pumping of cold fermionic atoms in a one-dimensional optical lattice. The quantization of the pumped c...