Determination of band diagram for a p-n junction between Mott insulator LaMnO3 and band insulator Nb:SrTiO3
- 9 February 2015
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 106 (6), 061605
- https://doi.org/10.1063/1.4908570
Abstract
The authors report on the band diagram of epitaxial p-n junctions between the Mott insulator with “p-type carriers” LaMnO3 and the n-type semiconductor Nb-doped SrTiO3 (Nb:STO) using x-ray photoemission spectroscopy. By changing the donor concentration in Nb:STO from 0.1 at. % to 1.0 at. %, the value of the built-in potential for the Nb:STO side (Vbn) is reduced from 0.55 ± 0.05 eV to 0.25 ± 0.05 eV. The modulation of Vbn is well described in the framework of the conventional p-n junction model. These results suggest that the characteristics of perovskite oxide p-n junctions can be predicted and designed using the transport properties of the constituent oxides, irrespective of their strongly correlated electronic nature.Keywords
Funding Information
- Japan Society for the Promotion of Science (B25287095, S22224005)
- Ministry of Education, Culture, Sports, Science, and Technology
This publication has 27 references indexed in Scilit:
- Collective bulk carrier delocalization driven by electrostatic surface charge accumulationNature, 2012
- Electric field control of the LaAlO3/SrTiO3 interface ground stateNature, 2008
- Highly rectifying Pr0.7Ca0.3MnO3∕SrTi0.9998Nb0.0002O3 p-n junctionApplied Physics Letters, 2005
- Engineered Interface of Magnetic OxidesScience, 2004
- Ferroelectric-field-induced tuning of magnetism in the colossal magnetoresistive oxidePhysical Review B, 2003
- Electric field effect in correlated oxide systemsNature, 2003
- Artificial charge-modulationin atomic-scale perovskite titanate superlatticesNature, 2002
- Giant Electric Field Modulation of Double Exchange Ferromagnetism at Room Temperature in the Perovskite Manganite/TitanateJunctionPhysical Review Letters, 2001
- LaMnO3+δRevisitedJournal of Solid State Chemistry, 1997
- Hall Mobility in SrTiPhysical Review B, 1967