Doping-Induced Ferromagnetism and Possible Triplet Pairing in d(4) Mott Insulators

Investor logo

Warning

This publication doesn't include Faculty of Sports Studies. It includes Central European Institute of Technology. Official publication website can be found on muni.cz.
Authors

CHALOUPKA Jiří KHALIULLIN Giniyat

Year of publication 2016
Type Article in Periodical
Magazine / Source Physical Review Letters
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.017203
Doi http://dx.doi.org/10.1103/PhysRevLett.116.017203
Field Solid matter physics and magnetism
Keywords spin models; magnetism; ruthenates
Description We study the effects of electron doping in Mott insulators containing 4d ions such as Ru4+, Os4+, Rh5+, and Ir5+ with J=0 singlet ground state. Depending on the strength of the spin-orbit coupling, the undoped systems are either nonmagnetic or host an unusual, excitonic magnetism arising from a condensation of the excited J=1 triplet states of t2g4. We find that the interaction between J excitons and doped carriers strongly supports ferromagnetism, converting both the nonmagnetic and antiferromagnetic phases of the parent insulator into a ferromagnetic metal, and further to a nonmagnetic metal. Close to the ferromagnetic phase, the low-energy spin response is dominated by intense paramagnon excitations that may act as mediators of a triplet pairing.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info