Superconducting Gap Modulation in Weak Stripe States
arXiv:cond-mat/0205504 · doi:10.1143/JPSJ.71.1836
Abstract
The superconducting gap modulation is investigated in the presence of a weak stripe structure, using the Bogoliubov-de Gennes theory on the two-dimensional Hubbard model with nearest-neighbor site pairing interaction. We calculate the local density of states and discuss the recently observed scanning tunneling spectroscopy spectra with four lattice periodicity on Bi_2 Sr_2 Ca Cu_2 O_{8+delta} We also consider the spectral weight in the reciprocal space, where the Fermi surface and the superconducting gap are modulated by the band folding effect of the stripe structure.
4 pages, 4 figures, to be published in J. Phys. Soc. Jpn