Published November 11, 2011
| Version v1
Journal article
Band Alignment, Built-In Potential, and the Absence of Conductivity at the LaCrO3/SrTiO3(001) Heterojunction
- 1. Pacific Northwest National Laboratory, Richland Washington 99352 (United States)
- 2. Department of Physics and Astronomy and London Centre for Nanotechnology, University College London, Gower Street, London, WC1E 6BT (United Kingdom)
Description
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.
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 107
- Journal Issue
- 20
- Journal Page Range
- p. 206802-206802.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43083875
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- CATIONS; CHROMIUM OXIDES; D STATES; HETEROJUNCTIONS; LANTHANUM COMPOUNDS; MOLECULAR BEAM EPITAXY; PHOTOEMISSION; STRONTIUM TITANATES; X-RAY SPECTRA
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHROMIUM COMPOUNDS; CRYSTAL GROWTH METHODS; EMISSION; ENERGY LEVELS; EPITAXY; IONS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SECONDARY EMISSION; SEMICONDUCTOR JUNCTIONS; SPECTRA; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2011 American Institute of Physics