75 citations · 240 across the 10 of their papers we have counts for
9 papers · 1 filter
Phase diagram of the extended chequerboard model
Jiayou Yin, Lu Liu
The chequerboard model was proposed to describe the direct phase transition from the antiferromagnetic (AFM) state to the plaquette-sin glet (PS) solid state observed in SrCu…
Coplanar order induced by emergent frustration
Zehui Deng, Lu Liu, Wenan Guo +1
Traditional frustration arises from the conflict between the spin alignments due to the geometry or the nature of the interactions. Here, we demonstrate a novel form of frustration…
Diagnosing Symmetry and First-Order Transition in the Model via Entanglement Entropy
Zehui Deng, Lu Liu, Wenan Guo +1
We study the scaling behavior of the Rényi entanglement entropy with smooth boundaries at the phase transition point of the two-dimensional model. Using the recently develo…
Improved scaling of the entanglement entropy of quantum antiferromagnetic Heisenberg systems
Zehui Deng, Lu Liu, Wenan Guo +1
In this paper, we derive corrections to the subleading logarithmic term of the entanglement entropy in systems with spontaneous broken continuous symmetry. Using quantum Monte Carl…
Proximate deconfined quantum critical point in SrCu2(BO3)2
Yi Cui, Lu Liu, Huihang Lin +10
The deconfined quantum critical point (DQCP) represents a paradigm shift in quantum matter studies, presenting a "beyond Landau" scenario for order--order transitions. Its experime…
Quantum-critical scaling properties of the two-dimensional random-singlet state
Lu Liu, Wenan Guo, Anders W. Sandvik
We use QMC simulations to study effects of disorder on the Heisenberg model with exchange constant on the square lattice supplemented by multispin interactions . It…
Extreme Suppression of Antiferromagnetic Order and Critical Scaling in a Two-Dimensional Random Quantum Magnet
Wenshan Hong, Lu Liu, Chang Liu +16
SrCuTeO is a square-lattice Néel antiferromagnet with superexchange between first-neighbor Cu spins mediated by plaquette centered Te ions. Substituting Te by W, th…
Typicality at quantum-critical points
Lu Liu, Anders W. Sandvik, WenAn Guo
We discuss the concept of typicality of quantum states at quantum-critical points, using projector Monte Carlo simulations of an bilayer Heisenberg antiferromagnet as an il…
Random-Singlet Phase in Disordered Two-Dimensional Quantum Magnets
Lu Liu, Hui Shao, Yu-Cheng Lin +2
We study effects of disorder (randomness) in a 2D square-lattice quantum spin system, the - model with a 6-spin interaction supplementing the Heisenberg exchange…