Topological corner modes in a brick lattice with nonsymmorphic symmetry
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AbstractThe quest for new realizations of higher-order topological system has garnered much recent attention. In this work, we propose a paradigmatic brick lattice model where corner modes require protection by nonsymmorphic symmetry in addition to two commuting mirror symmetries. Unlike the well-known square corner mode lattice, it has an odd number of occupied bands, which necessitates a different definition for the Z(2) x Z(2) topological invariant. By studying both the quadrupolar polarization and effective edge model, our study culminates in a phase diagram containing two distinct topological regimes. Our brick lattice corner modes can be realized in an RLC circuit setup and detected via colossal "topolectrical" resonances.
All Author(s) ListLiu YH, Wang YZ, Hu NC, Lin JY, Lee CH, Zhang X
Journal namePhysical Review B
Volume Number102
Issue Number3
Article number035142
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesMaterials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter;Materials Science;Physics

Last updated on 2021-18-10 at 00:06