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- W2951438081 abstract "We investigate a generalized Aubry-Andr'e-Harper (AAH) model with $p$-wave superconducting pairing. Both the hopping amplitudes between the nearest-neighboring lattice sites and the on-site potentials in this system are modulated by a cosine function with a periodicity of $1/ensuremath{alpha}$. In the incommensurate case $[ensuremath{alpha}=left(sqrt{5}ensuremath{-}1right)/2]$, due to the modulations on the hopping amplitudes, the critical region of this quasiperiodic system is significantly reduced and the system becomes easier to be turned from extended states to localized states. In the commensurate case $(ensuremath{alpha}=1/2)$, we find that this model shows three different phases when we tune the system parameters: Su-Schrieffer-Heeger (SSH)-like trivial, SSH-like topological, and Kitaev-like topological phases. The phase diagrams and the topological quantum numbers for these phases are presented in this work. This generalized AAH model combined with superconducting pairing provides us with a useful test field for studying the phase transitions from extended states to Anderson localized states and the transitions between different topological phases." @default.
- W2951438081 created "2019-06-27" @default.
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- W2951438081 date "2019-03-08" @default.
- W2951438081 modified "2023-09-24" @default.
- W2951438081 title "Generalized Aubry-André-Harper model with p-wave superconducting pairing" @default.
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