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Updated: May 26, 2026

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
Published on: February 8, 2018
Band alignment, built-in potential, and the absence of conductivity at the LaCrO3/SrTiO3(001) heterojunction
S A Chambers1, L Qiao, T C Droubay
1Pacific Northwest National Laboratory, Richland, Washington 99352, USA. sa.chambers@pnl.gov
Abstract:
Core-level and valence-band x-ray photoemission spectra measured for molecular-beam-epitaxy-grown LaCrO(3)/SrTiO(3)(001) yield band offsets and potential gradients within the LaCrO(3) sufficient to trigger an electronic reconstruction to alleviate the polarity mismatch. Yet, the interface is insulating. Based on first principles calculations, we attribute this unexpected result to interfacial cation mixing combined with charge redistribution within CrO(2) layers, enabled by low-lying d states within LaCrO(3), which suppresses an electronic reconstruction.
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