Cubic perovskite oxides are emerging high-mobility transparent conducting oxides (TCOs), but Ge-based TCOs had not been known until the discovery of metastable cubic ${\mathrm{SrGeO}}_3$. $0.5\times 0.4\times 0.2\text{−}\mathrm{m}{\mathrm{m}}^3$ large single crystals of the cubic ${\mathrm{SrGeO}}_3$ perovskite were successfully synthesized employing the high-pressure flux method. The phonon spectrum is determined from the IR optical reflectance and Raman-scattering analysis to evaluate the electron transport governed by optical phonon scattering. A calculated room-temperature mobility on the order of $3.9\times {10}^2\mathrm{c}{\mathrm{m}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$ is obtained, identifying cubic ${\mathrm{SrGeO}}_3$ as one of the most promising TCOs. Employing classical phonon theory and a combined experimental-theoretical approach, a comprehensive analysis of the intrinsic electron mobility in the cubic perovskite semiconductors ${\mathrm{SrGeO}}_3$, ${\mathrm{BaSnO}}_3$, and ${\mathrm{SrTiO}}_3$ is provided based on the magnitude of polarization and eigenfrequency of optically active phonons.

中文翻译：

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声波散射限制了代表性立方钙钛矿半导体中的迁移率SrGeO3，BaSnO3和SrTiO3

立方钙钛矿氧化物是新兴的高迁移率透明导电氧化物（TCO），但是直到发现亚稳态立方氧化物才知道Ge基TCO。 ${锶}_3$。 $0.5\times 0.4\times 0.2\text{-}\mathrm{米}{\mathrm{米}}^3$ 立方大单晶 ${锶}_3$高压钙法成功地合成了钙钛矿。通过红外光学反射率和拉曼散射分析确定声子光谱，以评估由声子散射引起的电子传输。计算得出的室温迁移率约为$3.9\times {10}^2\mathrm{C}{\mathrm{米}}^2{\mathrm{V}}^{-\mathrm{1个}}{\mathrm{s}}^{-\mathrm{1个}}$ 获得，确定立方 ${锶}_3$作为最有前途的TCO之一。利用经典声子理论和实验理论相结合的方法，对立方钙钛矿半导体中的本征电子迁移率进行了综合分析${锶}_3$， ${\mathrm{BaSnO}}_3$和 ${\mathrm{钛酸锶}}_3$ 根据光学有源声子的极化幅度和本征频率提供。