Header

UZH-Logo

Maintenance Infos

Detection of charge transfer processes in Cr-doped SrTiO3 single crystals


La Mattina, F; Bednorz, J G; Alvarado, S F; Shengelaya, A; Keller, H (2008). Detection of charge transfer processes in Cr-doped SrTiO3 single crystals. Applied Physics Letters, 93(2):022102.

Abstract

An insulator-to-metal transition is observed in Cr-doped SrTiO3 single crystals upon extended exposure to a high electric field, namely, electroconditioning (EC). Electron paramagnetic resonance (EPR) and transport measurements under laser irradiation show anticorrelation between the Cr3+ EPR signal and the electrical current. This proves that the Cr3+ ions are responsible for the photocurrent that initiates the EC process. We observe the presence of Cr3+/Cr4+ mixed valencies in the bulk in the conducting state. The EPR characterization of the spectra in the conducting state excludes the possibility of a Cr3+-oxygen vacancy complex in the bulk as a result of the EC. ©2008 American Institute of Physics

Abstract

An insulator-to-metal transition is observed in Cr-doped SrTiO3 single crystals upon extended exposure to a high electric field, namely, electroconditioning (EC). Electron paramagnetic resonance (EPR) and transport measurements under laser irradiation show anticorrelation between the Cr3+ EPR signal and the electrical current. This proves that the Cr3+ ions are responsible for the photocurrent that initiates the EC process. We observe the presence of Cr3+/Cr4+ mixed valencies in the bulk in the conducting state. The EPR characterization of the spectra in the conducting state excludes the possibility of a Cr3+-oxygen vacancy complex in the bulk as a result of the EC. ©2008 American Institute of Physics

Statistics

Citations

Dimensions.ai Metrics
25 citations in Web of Science®
25 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

177 downloads since deposited on 17 Feb 2009
53 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Physics and Astronomy (miscellaneous)
Language:English
Date:2008
Deposited On:17 Feb 2009 18:08
Last Modified:02 Nov 2023 02:41
Publisher:American Institute of Physics
ISSN:0003-6951
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1063/1.2959059
  • Content: Published Version