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arxiv: 1308.4221 · v2 · pith:MYB4FBP2new · submitted 2013-08-20 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci· cond-mat.supr-con

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 This is my paper
classification ❄️ cond-mat.str-el cond-mat.mtrl-scicond-mat.supr-con
keywords a-axis-orientedthin-filmselectronicepitaxialpropertiessr2iro4anisotropicc-axis
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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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