Artículo
Electrical transport across nanometric SrTiO3 and BaTiO3 barriers in conducting/insulator/conducting junctions
Navarro Fernández, Henry Luciano
; Sirena, Martin
; Gonzalez Sutter, Jesus Ignacio
; Troiani, Horacio Esteban
; del Corro, Pablo Guillermo
; Granell, Pablo Nicolás; Golmar, Federico
; Haberkorn, Nestor Fabian
Fecha de publicación:
11/01/2018
Editorial:
Institute of Physics Publishing
Revista:
Materials Research Express
ISSN:
2053-1591
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We report the electrical transport properties of conducting/insulator/conducting heterostructures by studying current-voltage IV curves at room temperature. The measurements were obtained on tunnel junctions with different areas (900, 400 and 100 μm2) using a conducting atomic force microscope. Trilayers with GdBa2Cu3O7 (GBCO) as the bottom electrode, SrTiO3 or BaTiO3 (thicknesses between 1.6 and 4 nm) as the insulator barrier, and GBCO or Nb as the top electrode were grown by DC sputtering on (100) SrTiO3 substrates For SrTiO3 and BaTiO3 barriers, asymmetric IV curves at positive and negative polarization can be obtained using electrodes with different work function. In addition, hysteretic IV curves are obtained for BaTiO3 barriers, which can be ascribed to a combined effect of the FE reversal switching polarization and an oxygen vacancy migration. For GBCO/BaTiO3/GBCO heterostructures, the IV curves correspond to that expected for asymmetric interfaces, which indicates that the disorder affects differently the properties at the bottom and top interfaces. Our results show the role of the interface disorder on the electrical transport of conducting/insulator/conduction heterostructures, which is relevant for different applications, going from resistive switching memories (at room temperature) to Josephson junctions (at low temperatures).
Palabras clave:
CONDUCTIVE ATOMIC FORCE MICROSCOPY
,
SPUTTERING
,
THIN FILMS
,
TUNNEL JUNCTIONS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Navarro Fernández, Henry Luciano; Sirena, Martin; Gonzalez Sutter, Jesus Ignacio; Troiani, Horacio Esteban; del Corro, Pablo Guillermo; et al.; Electrical transport across nanometric SrTiO3 and BaTiO3 barriers in conducting/insulator/conducting junctions; Institute of Physics Publishing; Materials Research Express; 5; 1; 11-1-2018; 1-11
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