Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions
Year:2012
Research Areas
  • Electronic technology and of the communications
Information
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.
International
Si
JCR
Si
Title
Physical Review B
ISBN
1098-0121
Impact factor JCR
3,691
Impact info
Volume
85
10.1103/PhysRevB.85.245122
Journal number
From page
2451221
To page
2451226
Month
SIN MES
Ranking
Participants
  • Autor: Marta Clement Lorenzo (UPM)
  • Autor: Enrique Iborra Grau (UPM)
  • Autor: F. A. Cuellar (Universidad Complutense de Madrid)
  • Autor: G. Sanchez-Santolino (Universidad Complutense de Madrid)
  • Autor: M. Varela (Universidad Complutense de Madrid)
  • Autor: Z. Sefriou (Universidad Complutense de Madrid)
  • Autor: J. Santamaria (Universidad Complutense de Madrid)
  • Autor: C. León (Universidad Complutense de Madrid)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Microsistemas y Materiales Electrónicos
  • Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
  • Departamento: Tecnología Electrónica
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)