3 papers
cond-mat.str-el2005★ 1 cited
Orbital excitations in titanates
C. Ulrich, A. Gössling, M. Grüninger +6
Raman scattering is used to observe pronounced electronic excitations around 230 meV - well above the two-phonon range - in the Mott insulators LaTiO and YTiO. Based on the…
cond-mat.str-el2004★ 77 cited
Theory of optical spectral weights in Mott insulators with orbital degrees of freedom
Giniyat Khaliullin, Peter Horsch, Andrzej M. Oles
Introducing partial sum rules for the optical multiplet transitions, we outline a unified approach to magnetic and optical properties of strongly correlated transition metal oxides…
cond-mat.str-el2002★ 40 cited
Entropy Driven Dimerization in a One-Dimensional Spin-Orbital Model
J. Sirker, G. Khaliullin
We study a new version of the one-dimensional spin-orbital model with spins S=1 relevant to cubic vanadates. At small Hund's coupling J_H we discover dimerization in a pure electro…