Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO3 and TiO2 single crystals

Yuji Matsumoto; Shintaro Takata; Ryohei Tanaka; Atsushi Hachiya

doi:10.1063/1.3530612

Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO₃ and TiO₂ single crystals

Yuji Matsumoto, Shintaro Takata, Ryohei Tanaka, Atsushi Hachiya

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Electric field dependence of the permittivity of Nb-doped SrTiO ₃(001) (Nb:STO) and Nb-doped TiO₂ (110) (Nb:TiO ₂) were investigated by using an electrochemical impedance spectroscopy method. The plots for Nb:STO could be well fitted to extrapolate the flat-band potential and the donor density, provided that a model of the electric field dependence of the permittivity of STO is incorporated into the conventional Mott-Schottky equation. The constants that represents a degree of the electric field dependence of the permittivity were calculated from the fitting parameters, and they were in good agreement with the reported values for the Nb:STO-based solid-state Schottky junction. In a similar way, the electric field dependence of the permittivity of Nb:TiO₂ was revealed but it was not so strong as the case of Nb:STO, which is a basis for the validity of the linear fitting approximation with the conventional Mott-Schottky equation for TiO₂.

Original language	English
Article number	014112
Journal	Journal of Applied Physics
Volume	109
Issue number	1
DOIs	https://doi.org/10.1063/1.3530612
Publication status	Published - 2011 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.3530612

Cite this

@article{924e3073e0b04c8aa2293c729e4c880f,

title = "Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO3 and TiO2 single crystals",

abstract = "Electric field dependence of the permittivity of Nb-doped SrTiO 3(001) (Nb:STO) and Nb-doped TiO2 (110) (Nb:TiO 2) were investigated by using an electrochemical impedance spectroscopy method. The plots for Nb:STO could be well fitted to extrapolate the flat-band potential and the donor density, provided that a model of the electric field dependence of the permittivity of STO is incorporated into the conventional Mott-Schottky equation. The constants that represents a degree of the electric field dependence of the permittivity were calculated from the fitting parameters, and they were in good agreement with the reported values for the Nb:STO-based solid-state Schottky junction. In a similar way, the electric field dependence of the permittivity of Nb:TiO2 was revealed but it was not so strong as the case of Nb:STO, which is a basis for the validity of the linear fitting approximation with the conventional Mott-Schottky equation for TiO2.",

author = "Yuji Matsumoto and Shintaro Takata and Ryohei Tanaka and Atsushi Hachiya",

note = "Funding Information: The authors thank Professor M. Hara and Dr. H. Kato of MSL Tokyo Tech for technical supports in the electrochemical measurements. This work has been partially supported by Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant No. 20360294).",

year = "2011",

month = jan,

day = "1",

doi = "10.1063/1.3530612",

language = "English",

volume = "109",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "1",

}

TY - JOUR

T1 - Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO3 and TiO2 single crystals

AU - Matsumoto, Yuji

AU - Takata, Shintaro

AU - Tanaka, Ryohei

AU - Hachiya, Atsushi

N1 - Funding Information: The authors thank Professor M. Hara and Dr. H. Kato of MSL Tokyo Tech for technical supports in the electrochemical measurements. This work has been partially supported by Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant No. 20360294).

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Electric field dependence of the permittivity of Nb-doped SrTiO 3(001) (Nb:STO) and Nb-doped TiO2 (110) (Nb:TiO 2) were investigated by using an electrochemical impedance spectroscopy method. The plots for Nb:STO could be well fitted to extrapolate the flat-band potential and the donor density, provided that a model of the electric field dependence of the permittivity of STO is incorporated into the conventional Mott-Schottky equation. The constants that represents a degree of the electric field dependence of the permittivity were calculated from the fitting parameters, and they were in good agreement with the reported values for the Nb:STO-based solid-state Schottky junction. In a similar way, the electric field dependence of the permittivity of Nb:TiO2 was revealed but it was not so strong as the case of Nb:STO, which is a basis for the validity of the linear fitting approximation with the conventional Mott-Schottky equation for TiO2.

AB - Electric field dependence of the permittivity of Nb-doped SrTiO 3(001) (Nb:STO) and Nb-doped TiO2 (110) (Nb:TiO 2) were investigated by using an electrochemical impedance spectroscopy method. The plots for Nb:STO could be well fitted to extrapolate the flat-band potential and the donor density, provided that a model of the electric field dependence of the permittivity of STO is incorporated into the conventional Mott-Schottky equation. The constants that represents a degree of the electric field dependence of the permittivity were calculated from the fitting parameters, and they were in good agreement with the reported values for the Nb:STO-based solid-state Schottky junction. In a similar way, the electric field dependence of the permittivity of Nb:TiO2 was revealed but it was not so strong as the case of Nb:STO, which is a basis for the validity of the linear fitting approximation with the conventional Mott-Schottky equation for TiO2.

UR - http://www.scopus.com/inward/record.url?scp=78751512793&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78751512793&partnerID=8YFLogxK

U2 - 10.1063/1.3530612

DO - 10.1063/1.3530612

M3 - Article

AN - SCOPUS:78751512793

SN - 0021-8979

VL - 109

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 1

M1 - 014112

ER -

Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO₃ and TiO₂ single crystals

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this