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J 1 -J 2 frustrated two-dimensional Heisenberg model: Random phase approximation and functional renormalization group
We study the ground-state properties of the two-dimensional spin-1/2 ${J}_{1}\text{\ensuremath{-}}{J}_{2}$ Heisenberg model on a square lattice, within diagrammatic approximations using an
Physical realization of a quantum spin liquid based on a complex frustration mechanism
A detailed and systematic study of Ca10Cr7O28 reveals all the hallmarks of spin-liquid behaviour, in spite of the compound’s unusually complex structure.
Quantum and Classical Phases of the Pyrochlore Heisenberg Model with Competing Interactions
We investigate the quantum Heisenberg model on the pyrochlore lattice for a generic spin-$S$ in the presence of nearest-neighbor $J_{1}$ and second-nearest-neighbor $J_{2}$ exchange interactions. By
Finite-temperature phase diagram of the Heisenberg-Kitaev model
We discuss the finite-temperature phase diagram of the Heisenberg-Kitaev model on the hexagonal lattice, which has been suggested to describe the spin-orbital exchange of the effective spin-1/2
Anisotropic susceptibilities in the honeycomb Kitaev system α−RuCl3
The magnetic insulator $\ensuremath{\alpha}\ensuremath{-}{\mathrm{RuCl}}_{3}$ is a promising candidate to realize Kitaev interactions on a quasi-two-dimensional honeycomb lattice. We perform
Functional renormalization group analysis of Dzyaloshinsky-Moriya and Heisenberg spin interactions on the kagome lattice
We investigate the effects of Dzyaloshinsky-Moriya (DM) interactions on the frustrated $J_1$-$J_2$ kagome-Heisenberg model using the pseudo-fermion functional-renormalization-group (PFFRG) technique.
Relevance of the Heisenberg-Kitaev model for the honeycomb lattice iridates A2IrO3.
It is estimated that Na2 IrO3 is deep in a magnetically ordered regime, while Li2IrO3 appears to be close to a spin-liquid regime.
Paramagnetism in the kagome compounds (Zn,Mg,Cd)Cu3(OH)6Cl2
Frustrated magnetism on the kagome lattice has been a fertile ground for rich and fascinating physics, ranging from experimental evidence of a spin liquid to theoretical predictions of exotic
Spiral order in the honeycomb iridate Li2IrO3
The honeycomb iridates A_2IrO_3 (A = Na, Li) constitute promising candidate materials to realize the Heisenberg-Kitaev model (HKM) in nature, hosting unconventional magnetic as well as spin-liquid
Numerical treatment of spin systems with unrestricted spin length S : A functional renormalization group study
We develop a generalized pseudo-fermion functional renormalization group (PFFRG) approach that can be applied to arbitrary Heisenberg models with spins ranging from the quantum case $S=1/2$ to the