Bound States of Fermions on 2d Lattice in a Dilute Limit

• Authors: M. Bąk , R. Micnas
• Languages of publication: EN

Abstracts

EN

We examine extended bound states in a dilute limit of the extended Hubbard model on the two-dimensional square lattice. By solving exactly the two-body problem we have determined the binding energies, mobilities, and dispersion curves across the Brillouin zone for bound states of various symmetries. It turns out that the d-wave pairing is strongly favored by the nnn hopping and the intersite local pairs can have small effective masses, even in the case of strong binding.We have also found a possibility of extended s-d_{x^{2}-y^{2}} mixing of the bound states.

Keywords

EN

74.20.-z; 03.65.Ge; 71.10.Fd

Discipline

• 74.20.-z: Theories and models of superconducting state
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 03.65.Ge: Solutions of wave equations: bound states

• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 1
• Pages: 209-212

Dates

published

2000-01

Contributors

author

M. Bąk

• Institute of Physics A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

R. Micnas

• Institute of Physics A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

Identifiers

DOI

10.12693/APhysPolA.97.209