Field-induced QCD-Chern-Simons quantum criticalities in Kitaev materials
arXiv:1809.09091 · doi:10.1103/PhysRevResearch.2.013072
Abstract
Kitaev materials are promising for realizing exotic quantum spin liquid phases, such as a non-Abelian chiral spin liquid. Motivated by recent experiments in these materials, we theoretically study the novel field-induced quantum phase transitions from the non-Abelian chiral spin liquid to the symmetry-broken zigzag phase and to the trivial polarized state. Utilizing the recently developed dualities of gauge theories, we find these transitions can be described by critical bosons or gapless fermions coupled to emergent non-Abelian gauge fields, and the critical theories are of the type of a QCD-Chern-Simons theory. We propose that all these exotic quantum phase transitions can potentially be direct and continuous in Kitaev materials, and we present sound evidence for this proposal. Therefore, besides being systems with intriguing quantum magnetism, Kitaev materials may also serve as table-top experimental platforms to study the interesting dynamics of emergent strongly interacting quarks and gluons in dimensions.
arXiv commentOnly the discussion on the QCD-Chern-Simons quantum phase transitions are retained in this version, with more theoretical details and experimental signatures explicitly spelled out. The discussion on the gapless phase in the pure Kitaev model under a magnetic field will be published elsewhere
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