# Bias voltage induced-electrical conductivity at electrode interfaces of a rutile TiO2 single crystal: Two different mechanisms depending on temperature

https://mdr.nims.go.jp/datasets/bb896ec4-e344-404e-9a71-b938d1259d55

## Files

- [paper (13).docx](https://mdr.nims.go.jp/filesets/77034b00-4604-419d-9d83-ea31fd8e8a00/download) ([Detail](https://mdr.nims.go.jp/filesets/77034b00-4604-419d-9d83-ea31fd8e8a00.md))

## Id

bb896ec4-e344-404e-9a71-b938d1259d55

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2023-12-17T22:39:40.667502Z

## Updated at

2025-12-06T03:30:33.021227Z

## Published at

2025-12-05T23:34:04.975456Z

## Doi

https://doi.org/10.48505/nims.4307

## First published url

https://doi.org/10.1016/j.surfin.2023.103703

## Date published

2023-12-05

## Recorded date published

2024-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: na
  title_type: alternative
  lang: ja
- title: 'Bias voltage induced-electrical conductivity at electrode interfaces of
    a rutile TiO2 single crystal: Two different mechanisms depending on temperature'
  title_type: original
  lang: en

## Description

- description: "The electric field-induced conductivity of TiO2 is important in various
    emerging practical applications,including the recently proposed selective trace
    hydrogen sensing. In the present study, the bias voltageinduced electrical characteristics
    were investigated between 295 K (ambient temperature) and 600 K for a semi-insulated
    rutile TiO2 single crystal. The appearance of conductivity by elevating the temperature
    was shown to be due to the electromigration of mobile dopants including defects.
    It was found that there are two different mechanisms causing the conductivity
    depending on the temperature. At low temperature, close to room temperature, hydrogen
    migrating primarily along the open [001] channel triggers the conductivity.\r\nOn
    the other hand at high temperature above 450 K, the migration of oxygen vacancy
    (VO) perpendicular to [001] induces the conductivity. It is proposed that VO is
    injected at the anode interface, which then migrates to the cathode interface
    and aggregates there. It was observed that the VO injection is not accompanied
    by the formation of the Magnèli phase. The proposed mechanism was examined by
    spectroscopic techniques such as time-of-flight secondary ion mass spectrometry
    and hard X-ray photoemission spectroscopy."
  description_type: abstract
  lang: eng

## Creator

- name: T.T. Suzuki
  role: author
  orcid: https://orcid.org/0000-0001-6041-4297
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Functional Materials
    Field/Electro-ceramics Group
  ror: https://ror.org/026v1ze26
- name: Y. Yamashita
  role: author
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Functional Materials
    Field/Nano Electronics Device Materials Group
  ror: https://ror.org/026v1ze26
- name: I. Sakaguchi
  role: author
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Functional Materials
    Field/Electro-ceramics Group
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Elsevier

## Managing organization



## Keyword

- subject: Rutile TiO2
  schema: not_defined
- subject: Oxygen vacancy
  schema: not_defined
- subject: Electrolytic coloration
  schema: not_defined
- subject: Electric field-induced diffusion
  schema: not_defined
- subject: Resistive switching
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2023-12-06
end_date: 2025-12-06

## Journal

- title: Surfaces and Interfaces
  issn: '24680230'
  volume: '44'
  article_number: '103703'

## Conference



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## Instrument



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## Chemical composition



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## Fileset

- id: 77034b00-4604-419d-9d83-ea31fd8e8a00
  filename: paper (13).docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 1719214
  md5: b79bf0ec5f96f4c63f8212a901692a18

## Thumbnail

fileset_id: 77034b00-4604-419d-9d83-ea31fd8e8a00
filename: paper (13).docx