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Article Dans Une Revue Physical Review Letters Année : 2020

Novel Chiral Quantum Spin Liquids in Kitaev Magnets

Résumé

Quantum magnets with pure Kitaev spin exchange interactions can host a gapped quantum spin liquid with a single Majorana edge mode propagating in the counterclockwise direction when a small positive magnetic field is applied. Here, we show how under a sufficiently strong positive magnetic field a topological transition into a gapped quantum spin liquid with two Majorana edge modes propagating in the clockwise direction occurs. The Dzyaloshinskii-Moriya interaction is found to turn the nonchiral Kitaev’s gapless quantum spin liquid into a chiral one with equal Berry phases at the two Dirac points. Thermal Hall conductance experiments can provide evidence of the novel topologically gapped quantum spin liquid states predicted.
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Dates et versions

hal-04147207 , version 1 (30-06-2023)

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Arnaud Ralko, Jaime Merino. Novel Chiral Quantum Spin Liquids in Kitaev Magnets. Physical Review Letters, 2020, 124 (21), pp.217203. ⟨10.1103/physrevlett.124.217203⟩. ⟨hal-04147207⟩

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