Cook, A. M., Matern, S., Hickey, C., Aczel, A. A. and Paramekanti, A. (2015). Spin-orbit coupled j(eff)=1/2 iridium moments on the geometrically frustrated fcc lattice. Phys. Rev. B, 92 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969
Full text not available from this repository.Abstract
Motivated by experiments on the double perovskites La2ZnIrO6 and La2MgIrO6, we study the magnetism of spin-orbit coupled j(eff) = 1/2 iridium moments on the three-dimensional, geometrically frustrated, face-centered cubic lattice. The symmetry-allowed nearest-neighbor interaction includes Heisenberg, Kitaev, and symmetric off-diagonal exchange. A Luttinger-Tisza analysis shows a rich variety of orders, including collinear A-type antiferromagnetism, stripe order with moments along the {111} direction, and incommensurate noncoplanar spirals, and we use Monte Carlo simulations to determine their magnetic ordering temperatures. We argue that existing thermodynamic data on these iridates underscores the presence of a dominant Kitaev exchange, and also suggest a resolution to the puzzle of why La2ZnIrO6, but not La2MgIrO6, exhibits weak ferromagnetism.
Item Type: | Journal Article | ||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-398612 | ||||||||||||||||||||||||
DOI: | 10.1103/PhysRevB.92.020417 | ||||||||||||||||||||||||
Journal or Publication Title: | Phys. Rev. B | ||||||||||||||||||||||||
Volume: | 92 | ||||||||||||||||||||||||
Number: | 2 | ||||||||||||||||||||||||
Date: | 2015 | ||||||||||||||||||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||||||||||||||||||
Place of Publication: | COLLEGE PK | ||||||||||||||||||||||||
ISSN: | 2469-9969 | ||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/39861 |
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