Pair formation in two electron correlated chains

Abstract

We study two correlated electrons in a nearest neighbour tight- binding chain, with both on site and nearest neighbour interaction. Both the cases of parallel and antiparallel spins are considered. In addition to the free electron band for two electrons, there are correlated bands with positive or negative energy, depending on wheather the interaction parameters are repulsive or attractive. Electrons form bound states, with amplitudes that decay exponentially with separation. Conditions for such states to be filled at low temperatures are discussed.

To appear in J. Phys: Condens. Matter 15 (2003)

References in corpus (1)

• Disorder-induced enhancement of the persistent current for strongly interacting electrons in one-dimensional rings

Cited by in corpus (4)

• Paired states of interacting electrons in a two dimensional lattice
• Metastable electron-pair states in a two-dimensional crystal
• On the Bardeen-Cooper-Schrieffer interaction in quantum graphs
• Unidirectional quantum walk of two correlated particles: Separating bound-pair and unbound wavepacket components