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arXiv · 1308.4221

Anisotropic electronic properties of a-axis-oriented Sr2IrO4 epitaxial thin-films

J. Nichols·O. B. Korneta·J. Terzic·L. E. De Long·G. Cao·J. W. Brill·S. S. A. Seo
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Abstract

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//b polarization show both Ir 5d intersite transitions and charge-transfer transitions (O 2p to Ir 5d), while E//c spectra show only the latter. The structural anisotropy created by biaxial strain in a-axis-oriented thin-films also changes the electronic structure and gap energy. These a-axis-oriented, epitaxial thin-films provide a powerful tool to investigate the highly anisotropic electronic properties of Sr2IrO4.

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J. Nichols, O. B. Korneta, J. Terzic, L. E. De Long, G. Cao, J. W. Brill, S. S. A. Seo. 2013-09-06. Anisotropic electronic properties of a-axis-oriented Sr2IrO4 epitaxial thin-films. https://doi.org/10.1063/1.4822334

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