221 citations · 1.2k across the 23 of their papers we have counts for
15 papers · 1 filter
Quantum effects in the magnon spectrum of 2D altermagnets via continuous similarity transformations
Raymond Wiedmann, Dag-Björn Hering, Vanessa Sulaiman +3
We investigate quantum effects on magnon excitations in a minimal spin-1/2 Heisenberg model for 2D altermagnets on the square lattice. A continuous similarity transformation is app…
Roton minimum as fingerprint of magnon-Higgs scattering in ordered quantum antiferromagnets
M. Powalski, G. S. Uhrig, K. P. Schmidt
A quantitative description of magnons in long-range ordered quantum antiferromagnets is presented which is consistent from low to high energies. It is illustrated for the generic $…
A generalized perspective on non-perturbative linked cluster expansions
K. Coester, S. Clever, F. Herbst +2
We identify a fundamental challenge for non-perturbative linked cluster expansions (NLCEs) resulting from the reduced symmetry on graphs, most importantly the breaking of translati…
Exotic magnetisation plateaus in a quasi-2D Shastry-Sutherland model
G. R. Foltin, S. R. Manmana, K. P. Schmidt
We find unconventional Mott insulators in a quasi-2D version of the Shastry-Sutherland model in a magnetic field. In our realization on a 4-leg tube geometry, these are stabilized…
Ising anyons with a string tension
M. D. Schulz, S. Dusuel, G. Misguich +2
We consider the string-net model on the honeycomb lattice for Ising anyons in the presence of a string tension. This competing term induces a nontrivial dynamics of the non-Abelian…
Fate of Dirac Points in a Vortex Superlattice
M. Kamfor, S. Dusuel, K. P. Schmidt +1
We consider noninteracting fermions on the honeycomb lattice in the presence of a magnetic vortex superlattice. It is shown that depending on the superlattice periodicity, a gap ma…