English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Second-order topological insulators (SOTI) exhibit protected gapless boundarystates at their hinges or corners. In this paper, we propose a generic means toconstruct SOTIs in static and Floquet systems by coupling one-dimensionaltopological insulator wires along a second dimension through dimerized hoppingamplitudes. The Hamiltonian of such SOTIs admits a Kronecker sum structure,making it possible for obtaining its features by analyzing two constituentone-dimensional lattice Hamiltonians defined separately in two orthogonaldimensions. The resulting topological corner states do not rely on any delicatespatial symmetries, but are solely protected by the chiral symmetry of thesystem. We further utilize our idea to construct Floquet SOTIs, whose number oftopological corner states is arbitrarily tunable via changing the hoppingamplitudes of the system. Finally, we propose to detect the topologicalinvariants of static and Floquet SOTIs constructed following our approach inexperiments by measuring the mean chiral displacements of wavepackets.

Coupled-wire construction of static and Floquet second-order topological insulators