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29 March 2024
 
  » arxiv » 1510.6035

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Aperiodic Weak Topological Superconductors
I. C. Fulga ; D. I. Pikulin ; T. A. Loring ;
Date 20 Oct 2015
AbstractWeak 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
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