Absolutely continuous energy bands in the electronic spectrum of quasiperiodic ladder networks
arXiv:1310.3372 · doi:10.1016/j.physe.2014.02.022
Abstract
The energy spectra of quasi-one dimensional quasiperiodic ladder networks are analyzed within a tight binding description. In particular, we show that if a selected set of sites in each strand of a ladder is tunnel-coupled to quantum dots attached from a side, absolutely continuous subbands can be generated in the spectrum if one tunes the dot potential and the dot-strand coupling appropriately. Typical cases with two and three strand Fibonacci ladders in the off diagonal model are discussed in details. We also discuss the possibility of re-entrant insulator-metal transition for a general n-strand ladder network when n becomes large. The observations remain valid even in the case of a disordered ladder network with the same constituents. The results are analytically exact.
9 pages, 7 figures, Modified Version
References in corpus (11)
- Direct observation of Anderson localization of matter-waves in a controlled disorder
- Multifractal analysis of the metal-insulator transition in the 3D Anderson model II: Symmetry relation under ensemble averaging
- Weak disorder expansion for localization lengths of quasi-1D systems
- Ladder network as a mesoscopic switch: An exact result
- Electronic Energy Spectra of Square and Cubic Fibonacci Quasicrystals
- Controlled engineering of extended states in disordered systems
- Electronic transmission in a model quantum wire with side coupled quasiperiodic chains: Fano resonance and related issues
- Complete absence of localization in a family of disordered lattices
- One-dimensional models of disordered quantum wires: general formalism
- Microcavity polaritons in disordered exciton lattices
- Excitation of coherent polaritons in a two-dimensional atomic lattice
Cited by in corpus (6)
- Flat bands by latent symmetry
- Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices
- Spectral Properties of Two Coupled Fibonacci Chains
- Spin filter for arbitrary spins by substrate engineering
- Spin filtering and switching action in a diamond network with magnetic-nonmagnetic atomic distribution
- Quasiperiodic magnetic chain as a spin filter for arbitrary spin states