Thermoelectric properties of natural superlattice crystals with low dimensional electric conduction layers

在这项研究中，我们论证了非化学计量比氧化物半导体作为热电材料的导电性和导热性。我们成功地得到了无量纲品质因子值为0。在非化学计量比的二氧化钛中，对于普遍存在的氧化物来说，这是相当大的。较大的声子散射值是由于在晶体剪切结构处的强声子散射，这主要是由热处理引起的。

In this study, we demonstrate the efficiency as thermoelectric materials of off-stoichiometric oxide semiconductor in terms of electric and thermal conductivity. We succeed to obtain the value of dimensionless figure of merit to be 0. 3 in off-stoichiometric titanium oxide, that is quite large for ubiquitous oxides. The large value is due to a strong phonon scattering at crystallographic shear structure which is largely introduced by a thermal treatment.