Phase Diagram of Correlated Electrons in a Lattice of Berry Phase Molecules
- Resource Type
- Authors
- Erio Tosatti; Marco Airoldi; Alberto Parola; Giuseppe E. Santoro; Nicola Manini
- Source
- Physical Review Letters. 74:4039-4042
- Subject
- Physics
Condensed matter physics
Bose gas
General Physics and Astronomy
Electron
Settore FIS/03 - Fisica della Materia
Geometric phase
Lattice (order)
Bound state
Low density
Molecule
Condensed Matter::Strongly Correlated Electrons
Phase diagram
- Language
- ISSN
- 1079-7114
0031-9007
A model for correlated electrons in a lattice with local additional spin--1 degrees of freedom inducing constrained hopping, is studied both in the low density limit and at quarter filling. We show that in both 1D and 2D two particles form a bound state even in presence of a repulsive U