Interplay between multipolar spin interactions, Jahn-Teller effect, and electronic correlation in a J<sub>eff</sub>= 3/2 insulator

Author(s)
Dario Fiore Mosca, Leonid V. Pourovskii, Beom Hyun Kim, Peitao Liu, Samuele Sanna, Federico Boscherini, Sergii Khmelevskyi, Cesare Franchini
Abstract

In this work, we study the complex entanglement between spin interactions, electron correlation, and Janh-Teller structural instabilities in the 5d1Jeff=32 spin-orbit coupled double perovskite Ba2NaOsO6 using first principles approaches. By combining noncollinear magnetic calculations with multipolar pseudospin Hamiltonian analysis and many-body techniques, we elucidate the origin of the observed quadrupolar canted antifferomagnetic. We show that the noncollinear magnetic order originates from Jahn-Teller distortions due to the cooperation of Heisenberg exchange, quadrupolar spin-spin terms, and both dipolar and multipolar Dzyaloshinskii-Moriya interactions. We find a strong competition between ferromagnetic and antiferromagnetic canted and collinear quadrupolar magnetic phases: the transition from one magnetic order to another can be controlled by the strength of the electronic correlation (U) and by the degree of Jahn-Teller distortions.

Organisation(s)
Computational and Soft Matter Physics, Computational Materials Physics
External organisation(s)
Institut Polytechnique de Paris, Collège de France, Korea Institute for Advanced Study, Università degli Studi di Bologna, Technische Universität Wien
Journal
Physical Review B
Volume
103
No. of pages
6
ISSN
2469-9950
DOI
https://doi.org/10.1103/PhysRevB.103.104401
Publication date
03-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103017 Magnetism
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/interplay-between-multipolar-spin-interactions-jahnteller-effect-and-electronic-correlation-in-a-jeff-32-insulator(2726d4bc-dd45-4096-bfc2-34bc7bace091).html