Thermopower in transition-metal perovskites

High-temperature thermopower is interpreted as entropy that a carrier carries. Owing to spin and orbital degrees of freedom, transition metal perovskite exhibits large at high temperatures. In this paper, we revisit the high-temperature in perovskites shed light on freedom. Thus, theoretically derive an expression one-dimensional octahedral-MX6-clusters chain using linear-response theory electronic structure calculation based tight-binding approximation. The derived consistent with extended Heikes formula well reproduced experimental data several oxides expression, degeneracy many electron states octahedral ligand field (which characterized by multiplet term) appears instead degeneracies. Complementarity between our discussed.