23 citations · 23 across the 2 of their papers we have counts for
5 papers
Non-Hermitian Topology and Boundary Jordan Chains with Generalized Chiral Symmetry
Alex Westström, Wenbu Duan, Jian Li
We study a generalization of chiral symmetry applicable to non-Hermitian systems and its topological consequences on one-dimensional chains. We find a rich family of topological ph…
Amorphous topological superconductivity in a Shiba glass
Kim Pöyhönen, Isac Sahlberg, Alex Westström +1
Topological states of matter support quantized nondissipative responses and exotic quantum particles that cannot be accessed in common materials. The exceptional properties and app…
Designer curved-space geometry for relativistic fermions in Weyl metamaterials
Alex Westström, Teemu Ojanen
Weyl semimetals are recently discovered materials supporting emergent relativistic fermions in the vicinity of band-crossing points known as Weyl nodes. The positions of the nodes…
Engineering 1D topological phases on -wave superconductors
Isac Sahlberg, Alex Westström, Kim Pöyhönen +1
In this work, we study how, with the aid of impurity engineering, two-dimensional -wave superconductors can be employed as a platform for one-dimensional topological phases. We…
Skyrmion-induced subgap states in p-wave superconductors
Kim Pöyhönen, Alex Westström, Sergey S. Pershoguba +2
In s-wave systems, it has been theoretically shown that a ferromagnetic film hosting a skyrmion can induce a bound state embedded in the opposite-spin continuum. In this work, we c…