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Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions
Citation
Cuellar Giménez, Fabián, Sánchez Santolino, Gabriel, Varela, M., Clement Lorenzo, Marta 
ORCID: https://orcid.org/0000-0003-4956-8206, Iborra Grau, Enrique ORCID: https://orcid.org/0000-0002-1385-1379, Sefrioui, Zouhair, Santamaría Sánchez-Barriga, Jacobo and León Yebra, Carlos
(2012).
Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions.
"Physical Review B", v. 85
;
pp. 2451221-2451226.
ISSN 1098-0121.
https://doi.org/10.1103/PhysRevB.85.245122.
Description
| Title: | Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions |
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| Author/s: |
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| Item Type: | Article |
| Título de Revista/Publicación: | Physical Review B |
| Date: | 20 July 2012 |
| ISSN: | 1098-0121 |
| Volume: | 85 |
| Subjects: | |
| Faculty: | E.T.S.I. Telecomunicación (UPM) |
| Department: | Tecnología Electrónica [hasta 2014] |
| Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
Abstract
We report on the electrical transport properties of all-oxide La0.7Ca0.3MnO3/SrTiO3:Nb heterojunctions with lateral size of just a few micrometers. The use of lithography techniques to pattern manganite pillars ensures perpendicular transport and allows exploration of the microscopic conduction mechanism through the interface. From the analysis of the current-voltage characteristics in the temperature range 20-280 K we find a Schottky-like behavior that can be described by a mechanism of thermally assisted tunneling if a temperature-dependent value of the dielectric permittivity of SrTiO3:Nb (NSTO) is considered.We determine the Schottky energy barrier at the interface, qVB = 1.10 ± 0.02 eV, which is found to be temperature independent, and a value of ? = 17 ± 2 meV for the energy of the Fermi level in NSTO with respect to the bottom of its conduction band.
Funding Projects
Type
Code
Acronym
Leader
Title
FP7
239739
STEMOX
Unspecified
Under the light of electrons
More information
| Item ID: | 15688 |
|---|---|
| DC Identifier: | https://oa.upm.es/15688/ |
| OAI Identifier: | oai:oa.upm.es:15688 |
| DOI: | 10.1103/PhysRevB.85.245122 |
| Official URL: | http://prb.aps.org/abstract/PRB/v85/i24/e245122 |
| Deposited by: | Memoria Investigacion |
| Deposited on: | 11 Jun 2013 19:33 |
| Last Modified: | 20 Oct 2014 15:54 |
