51 citations · 179 across the 5 of their papers we have counts for
4 papers
Charge and Spin Ordering in the Mixed Valence Compound LuFe2O4
A. B. Harris, T. Yildirim
Landau theory and symmetry considerations are invoked to give a unified treatment of charge and spin ordering in the mixed valence compound LuFe2O4. In particular, the unusual evol…
Unusual Symmetries in the Kugel-Khomskii Hamiltonian
A. B. Harris, Taner Yildirim, Amnon Aharony +2
The Kugel-Khomskii Hamiltonian for cubic titanates describes spin and orbital superexchange interactions between ions having three-fold degenerate orbitals. Since or…
Rotational and Vibrational Dynamics of Interstitial Molecular Hydrogen
T. Yildirim, A. B. Harris
The calculation of the hindered roton-phonon energy levels of a hydrogen molecule in a confining potential with different symmetries is systematized for the case when the rotationa…
Lifting of Multiphase Degeneracy by Quantum Fluctuations
A. B. Harris, C. Micheletti, J. M. Yeomans
We study the effect of quantum fluctuations on the multiphase point of the Heisenberg model with first- and second-neighbor competing interactions and strong uniaxial spin anisotro…