80 citations · 252 across the 11 of their papers we have counts for
9 papers · 1 filter
Symmetry breaking and thermal phase transition of the spin-1 quantum magnet with SU(3) symmetry on the simple cubic lattice
Nils Caci, Dominik Chudy, Pablo Daniel Mendez Mariscal +2
Using a combined analysis from Poisson-Dirichlet and symmetry-breaking calculations as well as quantum Monte Carlo simulations, we examine the ordered phase and the thermal phase t…
Phase transitions in the spin-1/2 Heisenberg antiferromagnet on the dimerized diamond lattice
Ronja Bärwolf, Alexander Sushchyev, Francesco Parisen Toldin +1
Using a combination of unbiased quantum Monte Carlo simulations and a decoupled dimer mean-field theory, we investigate the thermal and quantum phase transitions of the spin-1/2 He…
Thermodynamic properties of the macroscopically degenerate tetramer-dimer phase of the spin-1/2 Heisenberg model on the diamond-decorated square lattice
Katarina Karlova, Andreas Honecker, Nils Caci +3
The spin-1/2 Heisenberg antiferromagnet on the diamond-decorated square lattice in the presence of a magnetic field displays various quantum phases including the Lieb-Mattis ferrim…
Quantitative description of long-range order in the anisotropic spin-1/2 Heisenberg antiferromagnet on the square lattice
Nils Caci, Dag-Björn Hering, Matthias R. Walther +3
The quantitative description of long-range order remains a challenge in quantum many-body physics. We provide zero-temperature results from two complementary methods for the ground…
The Higgs Mode of Planar Coupled Spin-Ladders and its Observation in CHNCuBr
Tao Ying, Kai P. Schmidt, Stefan Wessel
Polarized inelastic neutron scattering experiments recently identified the amplitude (Higgs) mode in CHNCuBr, a two-dimensional near-quantum-critical spin-1/2 tw…
Thermodynamic properties of highly frustrated quantum spin ladders: influence of many-particle bound states
A. Honecker, S. Wessel, R. Kerkdyk +3
Quantum antiferromagnets have proven to be some of the cleanest realizations available for theoretical, numerical, and experimental studies of quantum fluctuation effects. At finit…
Magnetocaloric effect in quantum spin-s chains
A. Honecker, S. Wessel
We compute the entropy of antiferromagnetic quantum spin-s chains in an external magnetic field using exact diagonalization and Quantum Monte Carlo simulations. The magnetocaloric…
Field-Induced Magnetic Order in Quantum Spin Liquids
Stefan Wessel, Maxim Olshanii, Stephan Haas
We study magnetic field-induced three-dimensional ordering transitions in low-dimensional quantum spin liquids, such as weakly coupled, antiferromagnetic spin-1/2 Heisenberg dimers…
Order by disorder from non-magnetic impurities in a two-dimensional quantum spin liquid
S. Wessel, B. Normand, M. Sigrist +1
We consider doping of non-magnetic impurities in the spin-1/2, 1/5-depleted square lattice. This structure, whose undoped phase diagram offers both magnetically ordered and spin-li…