Bipartite non-Hermitian lattices support exceptional flat bands that arise from sublattice degeneracy mismatch and persist beyond exceptional points with biorthogonal modes spanning both sublattices.
Jin, Flat band induced by the interplay of synthetic magnetic flux and non-hermiticity, Phys
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Exceptional flat bands in bipartite non-Hermitian lattices
Bipartite non-Hermitian lattices support exceptional flat bands that arise from sublattice degeneracy mismatch and persist beyond exceptional points with biorthogonal modes spanning both sublattices.