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Temperature Dependence of the Ideality Factor of Ba1-xKxBiO3/Nb-doped SrTiO3All-Oxide-Type Schottky Junctions
- Source :
- Japanese Journal of Applied Physics; September 1998, Vol. 37 Issue: 9 p4737-4737, 1p
- Publication Year :
- 1998
-
Abstract
- Current-voltage measurements were performed on Ba1-xKxBiO3/Nb-doped SrTiO3(BKBO/STO:Nb) all-oxide-type Schottky junctions in the temperature range of 30 to 300 K. The relative permittivity ?r(E, T) of undoped SrTiO3(110) was measured as a function of both temperature and electric field. An anomalous increase in ideality factor n(T) and decrease in zero-bias barrier height ?b0(T) with decreasing temperature were observed and were analyzed using the interfacial layer model with a thin insulating interfacial layer present between metal contact (BKBO) and semiconductor interface (STO:Nb). The increase in n(T) at low temperature can be explained by taking into account the temperature dependence of the permittivity of the depletion layer (STO:Nb). The effect of the electric field dependence of the permittivity of STO:Nb on n(T) is also discussed using an approximate electric field dependence, ?r(T, E)=b/(a+E2)1/2, where aand bare constants.
Details
- Language :
- English
- ISSN :
- 00214922 and 13474065
- Volume :
- 37
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Japanese Journal of Applied Physics
- Publication Type :
- Periodical
- Accession number :
- ejs56132841
- Full Text :
- https://doi.org/10.1143/JJAP.37.4737