10 citations · 26 across the 5 of their papers we have counts for
5 papers
Quantum fluctuations in two-dimensional altermagnets
Niklas Cichutek, Peter Kopietz, Andreas Rückriegel
The magnetic properties of two-dimensional altermagnets can be obtained from a square lattice Heisenberg model with antiferromagetic nearest neighbor interaction and two types of n…
Spontaneous magnon decay in two-dimensional altermagnets
Niklas Cichutek, Peter Kopietz, Andreas Rückriegel
We show that magnons in two-dimensional altermagnets can spontaneously decay at zero temperature. The decay rate is determined by quantum fluctuations and scattering processes invo…
Non-Fermi liquid fixed point of the dissipative Yukawa-Sachdev-Ye-Kitaev model
Niklas Cichutek, Andreas Rückriegel, Peter Kopietz
Using a functional renormalization group approach we derive the renormalization group (RG) flow of a dissipative variant of the Yukawa-Sachdev-Ye-Kitaev model describing fermio…
Phonon renormalization and Pomeranchuk instability in the Holstein model
Niklas Cichutek, Max Hansen, Peter Kopietz
The Holstein model with dispersionless Einstein phonons is one of the simplest models describing electron-phonon interactions in condensed matter. A naive extrapolation of perturba…
Fluctuation-induced higher-derivative couplings and infrared dynamics of the Quark-Meson-Diquark Model
Niklas Cichutek, Florian Divotgey, Jürgen Eser
In a qualitative study, the low-energy properties of the -symmetric Quark-Meson-Diquark Model as an effective model for two-color Quantum Chromodynamics…