Universal Behaviors of the Phonon Thermal Conductivity Associated with Charge/Orbital Ordering in Transition-Metal Oxides

作者：Katsufuji Takuro^*; Okuda Tetsuji; Murata Ryuichi; Kanzaki Tatsuya; Takayama Kota; Kajita Tomomasa

来源：Journal of the Physical Society of Japan, 2016, 85(1): 013703.

DOI：10.7566/JPSJ.85.013703

We studied the thermal transport properties of transition-metal oxides, which have partially filled t(2g) 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 kappa(p) exhibits a universal behavior for all compounds; kappa(p)(T) decreases with decreasing T above the transition temperature T-c, whereas it is enhanced below T-c. This result implies that orbital/charge ordering in transition-metal oxides can be characterized by a unique T dependence of the phonon thermal conductivity.

• 出版日期2016-1-15