Fully stoichiometric epitaxial LaAlO3 grown on the TiO2-terminated SrTiO3(001) by off-axis pulsed laser deposition is shown to exhibit strong La-Sr cation intermixing. This result is predicted by classical and quantum mechanical calculations of the relative stabilities of abrupt and intermixed states. The extensive cation intermixing has a marked impact on the electronic properties of the interface.
Revised: August 18, 2014 |
Published: August 11, 2010
Citation
Qiao L., T.C. Droubay, V. Shutthanandan, Z. Zhu, P.V. Sushko, and S.A. Chambers. 2010.Thermodynamic Instability at the Stoichiometric LaAlO3/SrTiO3(001) Interface.Journal of Physics: Condensed Matter 22, no. 31:Art. No. 312201.PNNL-SA-73534.doi:10.1088/0953-8984/22/31/312201