Abstract.
We study a generalisation of the Hatano-Nelson Hamiltonian in which a periodic modulation of the site energies is present in addition to the usual random distribution. The system can then become localized by disorder or develop a band gap, and the eigenspectrum shows a wide variety of topologies. We determine the phase diagram, and perform a finite size scaling analysis of the localization transition.
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Hébert, F., Schram, M., Scalettar, R. et al. Hatano-Nelson model with a periodic potential. Eur. Phys. J. B 79, 465–471 (2011). https://doi.org/10.1140/epjb/e2011-10875-9
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DOI: https://doi.org/10.1140/epjb/e2011-10875-9