Kyusung Hwang

Quantum spin liquid in a breathing kagome lattice

Motivated by recent experiments on the vanadium oxyfluoride material DQVOF, we examine possible spin liquid phases on a breathing kagome lattice of S=1/2 spins. By performing a projective symmetry group analysis, we determine the possible phases for both fermionic and bosonic

Z2gauge theory for valence bond solids on the kagome lattice

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Emergent quantum phases in a frustratedJ1−J2Heisenberg model on the hyperhoneycomb lattice

spin liquids on this lattice, and establish the correspondence between the two. The nature of the ground state of the Heisenberg model on the isotropic kagome lattice is a hotly debated topic, with both

Theory of triplon dynamics in the quantum magnetBiCu2PO6

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Signatures of spin-triplet excitations in optical conductivity of valence bond solids

and U(1) spin liquids argued to be plausible ground states. Using variational Monte Carlo techniques, we show that a gapped

Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of a spin-12deformed kagome lattice antiferromagnet

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Quantum spin liquid and magnetic order in a two-dimensional nonsymmorphic lattice: Considering the distorted kagome lattice of volborthite

spin liquid emerges as the clear ground state in the presence of this breathing anisotropy. Our results suggest that the breathing anisotropy helps to stabilize this spin liquid ground state, which may aid us in understanding the results of experiments and help to direct future numerical studies on these systems.

Theory of Multifarious Quantum Phases and Large Anomalous Hall Effect in Pyrochlore Iridate Thin Films.

We present an effective

Generic model for the hyperkagome iridate Na 4 Ir 3 O 8 in the local-moment regime

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Three-dimensional nematic spin liquid in a stacked triangular lattice 6H-B structure

gauge theory that captures various competing phases in spin-1/2 kagome lattice antiferromagnets: the topological