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Abstract:

Current-voltage (IV) characteristics and the temperature dependence of the contact resistance [R(T)] of Au/YBa2Cu3O7-δ (optimally doped YBCO) interfaces have been studied at different resistance states. These states were produced by resistive switching after accumulating cyclic electrical pulses of increasing number and voltage amplitude. The IV characteristics and the R(T) dependence of the different states are consistent with a Poole-Frenkel (P-F) emission mechanism with trapping-energy levels Et in the 0.06-0.11 V range. Et remains constant up to a number-of-pulses-dependent critical voltage and increases linearly with a further increase in the voltage amplitude of the pulses. The observation of a P-F mechanism reveals the existence of an oxygen-depleted layer of YBCO near the interface. A simple electrical transport scenario is discussed, where the degree of disorder, the trap energy level, and the temperature range determine an electrical conduction dominated by non-linear effects, either in a P-F emission or in a variable-range hopping regime. © 2015 AIP Publishing LLC.

Registro:

Documento: Artículo
Título:Poole-Frenkel effect and variable-range hopping conduction in metal/YBCO resistive switching devices
Autor:Schulman, A.; Lanosa, L.F.; Acha, C.
Filiación:Laboratorio de Bajas Temperaturas, Departamento de Física, FCEyN, Universidad de Buenos Aires and, IFIBA - CONICET, Pabellón I, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Palabras clave:Switching systems; Temperature distribution; Yttrium barium copper oxides; Electrical conduction; Electrical transport; Poole-Frenkel effect; Poole-Frenkel emission; Resistive switching devices; Temperature dependence; Variable range hopping; Variable-range hopping conduction; Interface states
Año:2015
Volumen:118
Número:4
DOI: http://dx.doi.org/10.1063/1.4927522
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v118_n4_p_Schulman

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Citas:

---------- APA ----------
Schulman, A., Lanosa, L.F. & Acha, C. (2015) . Poole-Frenkel effect and variable-range hopping conduction in metal/YBCO resistive switching devices. Journal of Applied Physics, 118(4).
http://dx.doi.org/10.1063/1.4927522
---------- CHICAGO ----------
Schulman, A., Lanosa, L.F., Acha, C. "Poole-Frenkel effect and variable-range hopping conduction in metal/YBCO resistive switching devices" . Journal of Applied Physics 118, no. 4 (2015).
http://dx.doi.org/10.1063/1.4927522
---------- MLA ----------
Schulman, A., Lanosa, L.F., Acha, C. "Poole-Frenkel effect and variable-range hopping conduction in metal/YBCO resistive switching devices" . Journal of Applied Physics, vol. 118, no. 4, 2015.
http://dx.doi.org/10.1063/1.4927522
---------- VANCOUVER ----------
Schulman, A., Lanosa, L.F., Acha, C. Poole-Frenkel effect and variable-range hopping conduction in metal/YBCO resistive switching devices. J Appl Phys. 2015;118(4).
http://dx.doi.org/10.1063/1.4927522