Chiral RKKY interaction in Pr[subscript 2]Ir[subscript 2]O[subscript 7]
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Motivated by the potential chiral spin liquid in the metallic spin ice Pr[subscript 2]Ir[subscript 2]O[subscript 7], we consider how such a chiral state might be selected from the spin-ice manifold. We propose that chiral fluctuations of the conducting Ir moments promote ferrochiral couplings between the local Pr moments, as a chiral analog of the magnetic RKKY effect. Pr[subscript 2]Ir[subscript 2]O[subscript 7] provides an ideal setting to explore such a chiral RKKY effect, given the inherent chirality of the spin-ice manifold. We use a slave-rotor calculation on the pyrochlore lattice to estimate the sign and magnitude of the chiral coupling, and find it can easily explain the 1.5 K transition to a ferrochiral state.
Date issued
2013-03Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review B
Publisher
American Physical Society
Citation
Flint, Rebecca, and T. Senthil. “Chiral RKKY Interaction in Pr[subscript 2]Ir[subscript 2]O[subscript 7].” Phys. Rev. B 87, no. 12 (March 2013). © 2013 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X