title: Metal-insulator transition in an aperiodic ladder network: an exact result.
abstract: We prove that a tight-binding ladder network composed of atomic sites with on-site potentials distributed according to the quasiperiodic Aubry model can exhibit a metal-insulator transition at multiple values of the Fermi energy. For specific values of the first and second neighbor electron hopping, the result is obtained exactly. With a more general model, we numerically calculate the two-terminal conductance. The numerical results corroborate the analytical findings.
authors.affiliation: Department of Physics, Visva-Bharati, Santiniketan, West Bengal-731 235, India.
authors.forename: Shreekantha
authors.initials: S
authors.lastname: Sil
authors.forename: Santanu K
authors.initials: SK
authors.lastname: Maiti
authors.forename: Arunava
authors.initials: A
authors.lastname: Chakrabarti