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Competition of orbital, charge and spin degrees of freedom in Jahn-Teller magnets
Moskvin A. S.
1,2
1Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
2M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
2M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
Email: alexander.moskvin@urfu.ru
Jahn-Teller (JT) magnets are compounds based on Jahn-Teller 3d- and 4d-ions with the t2gn_1e_gn_2 configurations in a highly symmetric surroundings and with a ground state orbital E-doublet which are characterized by competition of various electronic degrees of freedom and strong electron-lattice interaction. In this paper, we present a generalized model of effective charge triplets, which allows, within a unified approach and in the most general form, to take into account charge, spin, orbital and lattice degrees of freedom for so-called single-band JT-magnets such as rare-earth nickelates RNiO3. Keywords: Jahn-Teller magnets, charge triplet model, effective spin-pseudospin-orbital hamiltonian, electron-lattice interaction.
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