Hofstadter butterflies in a modulated magnetic field: Superconducting wire network with magnetic decoration
Y.Iye, E.Kuramochi, M.Hara, A.Endo and S.Katsumoto
Phys. Rev. B 70 144524 (2004) Modify
Hofstadter butterfly spectra of tight-binding electron systems under
spacially modulated magnetic fields are calculated.
The dependence of the spectrum on the symmetry and strength of the spatially
varying magnetic field is elucidated.
The Little-Parks oscillation of the superconducting network under
a spatially modulated magnetic field produced by decoration with
mesoscopic magnetic structure exhibits behavior reproducing the edge
of the corresponding Hofstadter spectra.