Chambers, SA;
Qiao, L;
Droubay, TC;
Kaspar, TC;
Arey, BW;
Sushko, PV;
(2011)
Band Alignment, Built-In Potential, and the Absence of Conductivity at the LaCrO3/SrTiO3(001) Heterojunction.
PHYS REV LETT
, 107
(20)
, Article 206802. 10.1103/PhysRevLett.107.206802.
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Abstract
Core-level and valence-band x-ray photoemission spectra measured for molecular-beam-epitaxy-grown LaCrO3/SrTiO3(001) yield band offsets and potential gradients within the LaCrO3 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 CrO2 layers, enabled by low-lying d states within LaCrO3, which suppresses an electronic reconstruction.
| Type: | Article |
|---|---|
| Title: | Band Alignment, Built-In Potential, and the Absence of Conductivity at the LaCrO3/SrTiO3(001) Heterojunction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.107.206802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.107.206802 |
| Language: | English |
| Additional information: | © 2011 American Physical Society |
| Keywords: | INTERFACES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1330864 |
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