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Anisotropic electronic properties of <i>a</i>-axis-oriented Sr<sub>2</sub>IrO<sub>4</sub> epitaxial thin-films
We have investigated the transport and optical properties along the c-axis of a-axis-oriented Sr2IrO4 epitaxial thin-films grown on LaSrGaO4 (100) substrates. The c-axis resistivity is approximately one order of magnitude larger than that of the ab-plane. Optical absorption spectra with E⊥c polarization show both Ir 5d intersite transitions and charge-transfer …