In a non-separable 2D Aubry-André model, partially extended states persist at arbitrarily strong quasiperiodic modulation, localised on a network of low-disorder lines, yielding a mixed spectrum without a mobility edge.
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Mixed spectra and partially extended states in a two-dimensional quasiperiodic model
In a non-separable 2D Aubry-André model, partially extended states persist at arbitrarily strong quasiperiodic modulation, localised on a network of low-disorder lines, yielding a mixed spectrum without a mobility edge.