Possible chiral spin-liquid phase in noncentrosymmetric RBaCo4O7
Abstract
Based on a symmetry approach, we propose a possible explanation of the weak ferromagnetic component recently observed in YBaCo3FeO7 [M. Valldor , Phys. Rev. BPRBMDO1098-012110.1103/PhysRevB.84.224426 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.
- Publication:
-
Physical Review B
- Pub Date:
- June 2012
- DOI:
- 10.1103/PhysRevB.85.220401
- arXiv:
- arXiv:1204.2168
- Bibcode:
- 2012PhRvB..85v0401K
- Keywords:
-
- 75.10.Hk;
- Classical spin models;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- doi:10.1103/PhysRevB.85.220401