5 papers · 1 filter
Orbital order, anisotropic spin couplings, and the spin-wave spectrum of the ferromagnetic Mott insulator YTiO3
Robert Schmitz, Ora Entin-Wohlman, Amnon Aharony +1
Using a point-charge calculation of the electrostatic crystal field, we determine the non-degenerate orbital ground state of the ferromagnetic Mott insulator YTiO3, which is found…
Ferromagnetism in a hard-core boson model
A. Fledderjohann, A. Langari, E. Mueller-Hartmann +1
The problem of ferromagnetism -- associated with a ground state with maximal total spin -- is discussed in the framework of a hard-core model, which forbids the occupancy at each s…
The spin-wave spectrum of the Jahn-Teller system LaTiO3
Robert Schmitz, Ora Entin-Wohlman, Amnon Aharony +2
We present an analytical calculation of the spin-wave spectrum of the Jahn-Teller system LaTiO3. The calculation includes all superexchange couplings between nearest-neighbor Ti io…
Metallizing the Mott insulator TiOCl by electron doping: a view from LDA+DMFT
L. Craco, M. S. Laad, E. Müller-Hartmann
Based on recent experiments, we describe the Mott insulating, but undimerized state of using the local-density approximation combined with multi-orbital dynamical mean fiel…
The magnetic structure of the Jahn-Teller System LaTiO3
Robert Schmitz, Ora Entin-Wohlman, Amnon Aharony +2
We investigate the effect of the experimentally observed Jahn-Teller distortion of the oxygen octahedra in LaTiO3 on the magnetic exchange. We present a localized model for the eff…