Leakage current of Pt/(Ba0.7Sr0.3)TiO3 (BST)/YBa2Cu3O7-δ capacitors on a (001) SrTiO3 substrate was studied. By modeling a low-dielectric constant layer, a so-called dead layer, between the Pt/BST interface as a parasitic capacitor in series with the bulk layer capacitor, the leakage current of Pt/BST interface was well analyzed based on the modified Schottky emission equation. Furthermore, a two-step schematic energy band diagram is proposed to explain the carrier transport through the Pt/BST interface.
Published in:
Journal of Applied Physics
(Volume:97
,
Issue:
2
)
Date of Publication:
Jan 2005
- Page(s):
-
024106
-
024106-4
- ISSN :
-
0021-8979
- Digital Object Identifier :
-
10.1063/1.1828219
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Jan 2005