Universität zu Köln

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
Creators:	Creators Email ORCID ORCID Put Code Cook, A. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Matern, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hickey, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aczel, A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Paramekanti, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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
Uncontrolled Keywords:	Keywords Language MAGNETIC-STRUCTURES; QUANTUM; TRANSITION; EXCHANGE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39861