Publications by authors named "Xixi Bao"

Article Synopsis
  • Previous assumptions suggested that continuum bands could be easily connected to open-boundary spectra regardless of system size, but new findings show a more complicated relationship.
  • As systems grow larger, the increase of complex eigenvalues occurs slowly and unevenly, leading to less overlap between continuum bands and open-boundary eigenvalues.
  • Interestingly, despite being non-Hermitian, the eigenstates behave similarly to Bloch waves, indicating potential implications for both theoretical and experimental studies of non-Hermitian systems.*
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Auxetic re-entrant honeycomb (AREH) structures, consisting of a single soft or tough material, have long faced the challenge of balancing stiffness and rebound resilience. To achieve this balance, dual-material printing technology is employed to enhance shock absorption by combining layers of soft and tough materials. Additionally, a novel structure called the curved re-entrant honeycomb (CREH) structure has been introduced to improve stiffness.

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Non-equilibrium phases of matter have attracted much attention in recent years, among which the Floquet phase is a hot point. In this work, based on the periodic driving non-Hermitian model, we reveal that the winding number calculated in the framework of the Bloch band theory has a direct connection with the number of edge states even though the non-Hermiticity is present. Further, we find that the change of the phase of the hopping amplitude can induce the topological phase transitions.

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The asymmetrical long-range hopping amplitudes have a rich influence on the topological properties. Here, a non-Hermitian model including the long-range hopping amplitudes is constructed to explore those properties. It can be found that an extra topological invariant= 2 emerges as a consequence of the long-range hopping amplitudes.

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Disorders have a rich influence on topological and localized properties. Here, we explore the effects of different type of disorders (intracell and intercell) on the non-Hermitian system. We first exhibit the phase diagram and find that the intracell disorder and intercell disorder can broaden and narrow the topological region, respectively.

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