Pairing and Excitation Spectrum in doped t-J Ladders
Condensed Matter
2007-05-23 v1
Abstract
Exact diagonalization studies for a doped t-J ladder (or double chain) show hole pairing in the ground state. The excitation spectrum separates into a limited number of quasiparticles which carry charge and spin and a triplet mode. At half-filling the former vanish but the latter evolves continuously into the triplet band of the spin liquid. At low doping the quasiparticles form a dilute Fermi gas with a strong attraction but simultaneously the Fermi wavevector, as would be measured in photoemission, is large.
Keywords
Cite
@article{arxiv.cond-mat/9401050,
title = {Pairing and Excitation Spectrum in doped t-J Ladders},
author = {Hirokazu Tsunetsugu and Matthias Troyer and T. Maurice Rice},
journal= {arXiv preprint arXiv:cond-mat/9401050},
year = {2007}
}
Comments
10 pages and 4 PostScript figures, RevTeX 3.0, ETH-TH/94-01