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Possible chiral spin-liquid phase in noncentrosymmetric BaCoO
Phys. Rev. B 85, 220401(R) – Published 13 June, 2012
DOI: https://doi.org/10.1103/PhysRevB.85.220401
Abstract
Based on a symmetry approach, we propose a possible explanation of the weak ferromagnetic component recently observed in YBaCoFeO [M. Valldor et al., Phys. Rev. B 84, 224426 (2011)] and other isostructural compounds in the high-temperature spin-liquid phase. Due to the polar nature of their crystal structure, a coupling between time-odd scalar spin chirality which we suggest as the primary order parameter and macroscopic magnetization is possible as follows from the general form of the appropriate free-energy invariant. The deduced pseudoproper coupling between both physical quantities provides a unique possibility to study the critical behavior of the chiral order parameter.
Article Text
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