126 citations · 327 across the 12 of their papers we have counts for
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Cavity-renormalized quantum criticality in a honeycomb bilayer antiferromagnet
Lukas Weber, Emil Viñas Boström, Martin Claassen +2
Strong light-matter interactions as realized in an optical cavity provide a tantalizing opportunity to control the properties of condensed matter systems. Inspired by experimental…
Thermal critical points from competing singlet formations in fully frustrated bilayer antiferromagnets
Lukas Weber, Antoine Yves Dimitri Fache, Frédéric Mila +1
We examine the ground-state phase diagram and thermal phase transitions in a plaquettized fully frustrated bilayer spin-1/2 Heisenberg model. Based on a combined analysis from sign…
Cluster quantum Monte Carlo study of two-dimensional weakly-coupled frustrated trimer antiferromagnets
Lukas Weber, Nils Caci, Stefan Wessel
We report results from spin trimer-based cluster quantum Monte Carlo simulations for the thermodynamic properties of two-dimensional frustrated quantum antiferromagnets that are co…
Quantum Monte Carlo simulations of highly frustrated magnets in a cluster basis: The two-dimensional Shastry-Sutherland model
Andreas Honecker, Lukas Weber, Philippe Corboz +2
Quantum Monte Carlo (QMC) simulations constitute nowadays one of the most powerful methods to study strongly correlated quantum systems, provided that no "sign problem" arises. How…
Hierarchical single-ion anisotropies in spin-1 Heisenberg antiferromagnets on the honeycomb lattice
Nils Caci, Lukas Weber, Stefan Wessel
We examine the thermal properties of the spin-1 Heisenberg antiferromagnet on the honeycomb lattice in the presence of an easy-plane single-ion anisotropy as well as the effects of…
Quantum Monte Carlo simulations in the trimer basis: first-order transitions and thermal critical points in frustrated trilayer magnets
L. Weber, A. Honecker, B. Normand +3
The phase diagrams of highly frustrated quantum spin systems can exhibit first-order quantum phase transitions and thermal critical points even in the absence of any long-ranged ma…
Signatures for Berezinsky-Kosterlitz-Thouless critical behaviour in the planar antiferromagnet BaNiVO
E. S. Klyushina, J. Reuther, L. Weber +6
We investigate the critical properties of the spin- honeycomb antiferromagnet BaNiVO, both below and above the ordering temperature using neutron diffraction a…
Spin vs. bond correlations along dangling edges of quantum critical magnets
Lukas Weber, Stefan Wessel
Dangling edge spins of two-dimensional quantum critical antiferromagnets display strongly enhanced spin correlations with scaling dimensions that fall outside of the classical theo…
A quantum magnetic analogue to the critical point of water
J. Larrea Jiménez, S. P. G. Crone, E. Fogh +13
At the familiar liquid-gas phase transition in water, the density jumps discontinuously at atmospheric pressure, but the line of these first-order transitions defined by increasing…
Emergent symmetries and coexisting orders in Dirac fermion systems
Emilio Torres, Lukas Weber, Lukas Janssen +2
The quantum phase diagram and critical behavior of two-dimensional Dirac fermions coupled to two compatible order-parameter fields with symmetry is investigat…
Nonordinary criticality at the edges of planar spin-1 Heisenberg antiferromagnets
Lukas Weber, Stefan Wessel
Dangling edge spins of dimerized two-dimensional spin-1 Heisenberg antiferromagnets are shown to exhibit nonordinary quantum critical correlations, akin to the scaling behavior obs…
Nonordinary edge criticaliy of two-dimensional quantum critical magnets
Lukas Weber, Francesco Parisen Toldin, S. Wessel
Based on large-scale quantum Monte Carlo simulations, we examine the correlations along the edges of two-dimensional semi-infinite quantum critical Heisenberg spin- systems. I…