在ZrO $_{2}$：Y（001）衬底上生长的Li2IrO3薄膜的电子激发和结构
Electronic excitations and structure of Li2IrO3 thin films grown on ZrO$_{2}$:Y (001) substrates
摘要：
薄膜是铱酸盐中由强自旋轨道耦合和电子关联相互作用产生的奇异基态应用的先决条件。报道了在ZrO $_{2}$：Y（001）单晶衬底上脉冲激光沉积Li $_{2}$ IrO $_{3}$薄膜的研究。X射线衍射证实了优先的（001）和（10-1）面外晶体取向，具有良好定义的面内取向。35和300 K之间的电阻率是由一个三维的可变范围跳跃机制。的介电函数是通过光谱椭圆偏振法和傅里叶变换红外透射光谱的补充，揭示了一个小的光学间隙的$\approx$ 300毫电子伏，分裂的$5d$ - $t_{2g}$流形，和几个间隙激发归因于声子和可能的磁振子。
英文摘要：
Thin films are a prerequisite for application of the emergent exotic ground states in iridates that result from the interplay of strong spin-orbit coupling and electronic correlations. We report on pulsed laser deposition of Li$_{2}$IrO$_{3}$ films on ZrO$_{2}$:Y(001) single crystalline substrates. X-ray diffraction confirms preferential (001) and (10-1) out-of-plane crystalline orientations with well defined in-plane orientation. Resistivity between 35 and 300 K is dominated by a three-dimensional variable range hopping mechanism. The dielectric function is determined by means of spectroscopic ellipsometry and, complemented by Fourier transform infrared transmission spectroscopy, reveals a small optical gap of $\approx$ 300 meV, a splitting of the $5d$-$t_{2g}$ manifold, and several in-gap excitations attributed to phonons and possibly magnons.
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