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Article overview
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Aperiodic Weak Topological Superconductors | I. C. Fulga
; D. I. Pikulin
; T. A. Loring
; | Date: |
20 Oct 2015 | Abstract: | Weak topological phases are usually described in terms of protection by the
lattice translation symmetry. Their characterization explicitly relies on
periodicity since weak invariants are expressed in terms of the momentum-space
torus. We prove the compatibility of weak topological superconductors with
aperiodic systems, such as quasicrystals. We go beyond usual descriptions of
weak topological phases and introduce a novel, real-space formulation of the
weak invariant, based on the Clifford pseudospectrum. A non-trivial value of
this index implies a non-trivial bulk phase, which is robust against disorder
and hosts localized zero-energy modes at the edge. | Source: | arXiv, 1510.6035 | Services: | Forum | Review | PDF | Favorites |
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