139 citations · 141 across the 6 of their papers we have counts for
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Twisted (co)homology of non-orientable Weyl semimetals
Thijs Douwes, Marcus Stålhammar
The quasi-particle excitations in Weyl semimetals, known as Weyl fermions, are usually forced to emerge in charge-conjugate pairs by the Nielsen--Ninomiya theorem. When the Brillou…
Thermodynamics of analogue black holes in a non-Hermitian tight-binding model
D. F. Munoz-Arboleda, M. Stålhammar, C. Morais Smith
We present a non-Hermitian model with gain/loss and non-reciprocal next-nearest-neighbor hopping that emulates black-hole physics. The model describes a one-dimensional lattice wit…
Abelian Spectral Topology of Multifold Exceptional Points
Marcus Stålhammar, Lukas Rødland
The advent of non-Hermitian physics has enriched the plethora of topological phases to include phenomena without Hermitian counterparts. Despite being among the most well-studied u…
Knotted Non-Hermitian Metals
Johan Carlström, Marcus Stålhammar, Jan Carl Budich +1
We report on the occurrence of knotted metallic band structures as stable topological phases in non-Hermitian (NH) systems. These knotted NH metals are characterized by open Fermi…