Institute of Physics, Georgian Academy, Tbilisi, Georgia.
Electrons with alternating on-site and correlated hopping interactions†
Article first published online: 14 MAR 2006
Copyright © 1994 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Annalen der Physik
Volume 506, Issue 5, pages 392–407, 1994
How to Cite
Japaridze, G. and Müller-Hartmann, E. (1994), Electrons with alternating on-site and correlated hopping interactions. Ann. Phys., 506: 392–407. doi: 10.1002/andp.19945060505
Research performed within the program of the Sonderforschungsbereich 341 supported by the Deutsche Forschungsgemeinschaft.
- Issue published online: 14 MAR 2006
- Article first published online: 14 MAR 2006
- Manuscript Accepted: 27 APR 1994
- Manuscript Received: 16 MAR 1994
- Alternating interactions;
- Bond-charge repulsion;
- Phase diagrams
The 1 D one-band Hubbard model with different repulsive on-site interactions on even (U+V > 0) and odd (U-V > 0) sites, supplemented by the correlated-hopping term (t* > 0), describing the modification of the electron hopping by the presence of other particles on the sites, is considered as a 1 D model for CuO systems. The ground state phase diagram is studied within the framework of the bosonization technique and renormalization group analysis valid for weak coupling. Depending on the choice of model parameters, the following sequences of phase transitions with increasing bandfilling occur: 1) metal-insulator-metal (for t* ⩽ U/4); 2) metal-insulator-metal-superconductor metal-superconductor-metal-insulator-metal-superconductor metal-superconductor .