Monte Carlo study of the pairing interaction in the twoleg Hubbard ladder
Abstract
Monte Carlo calculations of the irreducible particleparticle interaction on a twoleg Hubbard ladder doped near halffilling are reported. As the temperature is lowered, this interaction develops structure in momentum space similar to the magnetic susceptibility $\chi(q)$ and reflects the development of strong shortrange antiferromagnetic correlations. Using this interaction, the eigenfunction of the leading singlet pair eigenvalue is found to have $d_{x^2y^2}$ like symmetry. The singleparticle spectral weight is also shown to peak near $(\pi,0)$ and $(0,\pi)$ when the ratio of the inter to intrachain hopping $t_{\perp}/t\simeq 1.5$, leading to an increased tendency for pairing.
 Publication:

arXiv eprints
 Pub Date:
 December 1996
 arXiv:
 arXiv:condmat/9612166
 Bibcode:
 1996cond.mat.12166B
 Keywords:

 Condensed Matter  Superconductivity;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 9 pages including 5 eps figures, uses revtex and epsfig