Advanced Design and Fabrication of Dual-Material Honeycombs for Improved Stiffness and Resilience.

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.

Floquet topological properties in the non-Hermitian long-range system with complex hopping amplitudes.

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.

Exploration of the topological properties in a non-Hermitian long-range system.

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.

The topological criticality in disordered non-Hermitian system.

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.