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Coupling of Higgs and Leggett modes in nonequilibrium superconductors
H. Krull, N. Bittner, G. S. Uhrig +2
Collective excitation modes are a characteristic feature of symmetry-broken phases of matter. For example, superconductors exhibit an amplitude Higgs mode and a phase mode, which a…
Sputtering induced re-emergence of the topological surface state in BiSe
Raquel Queiroz, Gabriel Landolt, Stefan Muff +9
We study the fate of the surface states of BiSe under disorder with strength larger than the bulk gap, caused by neon sputtering and nonmagnetic adsorbates. We find that ne…
Edge instabilities of topological superconductors
Johannes S. Hofmann, Fakher F. Assaad, Andreas P. Schnyder
Nodal topological superconductors display zero-energy Majorana flat bands at generic edges. The flatness of these edge bands, which is protected by time-reversal and translation sy…
Topological semi-metals with line nodes and drumhead surface states
Y. -H. Chan, Ching-Kai Chiu, M. Y. Chou +1
In an ordinary three-dimensional metal the Fermi surface forms a two-dimensional closed sheet separating the filled from the empty states. Topological semimetals, on the other hand…
Structure of vortex-bound states in spin-singlet chiral superconductors
Darrick Lee, Andreas P. Schnyder
We investigate the structure of vortex-bound states in spin-singlet chiral superconductors with ()-wave and ()-wave pairing symmetries…
Classification of topological quantum matter with symmetries
Ching-Kai Chiu, Jeffrey C. Y. Teo, Andreas P. Schnyder +1
Topological materials have become the focus of intense research in recent years, since they exhibit fundamentally new physical phenomena with potential applications for novel devic…