Jul 7, 2020 · This paper demonstrates a quadrupole topological insulator with zero-energy corner modes and a pair of edge polarizations. The authors also find that such topological …

May 26, 2021 · In this study, we report the realization of the 2D quasicrystalline QTIs in electrical circuits and observe the corner states experimentally.

Analogously, based on the type-II QTI, we find two types of new three-dimensional higher-order topological insulators. In one insulator, the winding of the quadrupole moment, corner charges …

Jul 2, 2023 · Here, by constructing and exploring a model Hamiltonian under a staggered Z2 gauge field that respects momentum-glide reflection symmetries, we surprisingly find a …

Apr 1, 2024 · Here we report the realization of a quadrupole topological insulator phase in a gyromagnetic PhC, as a consequence of topological phase transition from the previously …

Mar 15, 2018 · Here we demonstrate experimentally a member of this predicted class of materials—a quantized quadrupole topological insulator—produced using a gigahertz …

May 18, 2020 · Here, we introduce a feasible approach to design the sign of hopping in acoustics, and construct the first acoustic quadrupole topological insulator that stringently emulates the …

Jan 15, 2018 · Here we report measurements of a phononic quadrupole topological insulator. We experimentally characterize the bulk, edge and corner physics of a mechanical metamaterial …

Jul 2, 2020 · Here, we present a theory for anomalous quadrupole topological insulators in nonsymmorphic crystals without flux using two-dimensional sonic crystals with $p4gm$ and …

Dec 8, 2023 · By designing different -flux patterns, we propose two types of Klein-bottle BBH models. These models show rich topological phases, including Klein-bottle quadrupole …