Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-04-22
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1088/0953-8984/11/48/333
The interplay between spin and orbital degrees of freedom in the Mott-Hubbard insulator is studied by considering an orbitally degenerate superexchange model. We argue that orbital order and the orbital excitation gap in this model are generated through the order-from-disorder mechanism known previously from frustrated spin models. We propose that the orbital gap should show up indirectly in the dynamical spin structure factor; it can therefore be measured using the conventional inelastic neutron scattering method.
Khaliullin Giniyat
Kilian R.
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