Classification of topological invariants related to corner states
نویسندگان
چکیده
Abstract We discuss some bulk-surface gapped Hamiltonians on a lattice with corners and propose periodic table for topological invariants related to corner states aimed at studies of higher-order insulators. Our is based four things: (1) the definition invariants, (2) proof their relation states, (3) computations K -groups (4) construction explicit examples.
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ژورنال
عنوان ژورنال: Letters in Mathematical Physics
سال: 2021
ISSN: ['0377-9017', '1573-0530']
DOI: https://doi.org/10.1007/s11005-021-01460-8