We studied the thermal transport properties of transition-metal oxides, which have partially filled t2g orbitals of transition metals and exhibit intriguing phase transitions caused by orbital=charge ordering. We found that the temperature (T) dependence of the phonon thermal conductivity κp exhibits a universal behavior for all compounds; κp(T) decreases with decreasing T above the transition temperature Tc, whereas it is enhanced below Tc. This result implies that orbital=charge ordering in transition-metal oxides can be characterized by a unique T dependence of the phonon thermal conductivity.
ASJC Scopus subject areas
- Physics and Astronomy(all)