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cond-mat.mes-hall2018
Necessary and sufficient conditions for flat bands in -dimensional -band lattices with complex-valued nearest-neighbour hopping
L. A. Toikka, A. Andreanov
We formulate the necessary and sufficient conditions for the existence of dispersionless energy eigenvalues (so-called `flat bands') and their associated compact localized eigensta…
cond-mat.quant-gas2018
Accurate projective two-band description of topological superfluidity in spin-orbit-coupled Fermi gases
J. Brand, L. A. Toikka, U. Zülicke
The interplay of spin-orbit coupling and Zeeman splitting in ultracold Fermi gases gives rise to a topological superfluid phase in two spatial dimensions that can host exotic Major…