Persistent photoinduced superconductivity

A. Hoffmann; J. Hasen; D. Lederman; T. Endo; Y. Bruynseraede; Ivan K. Schuller

doi:10.1016/S0925-8388(96)02775-2

Persistent photoinduced superconductivity

A. Hoffmann, J. Hasen, D. Lederman, T. Endo, Y. Bruynseraede, Ivan K. Schuller

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

Abstract

We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa₂Cu₃O_x thin films. It is shown that the resistivity, Hall coefficient and c-axis parameter change significantly upon illumination. All these effects require the presence of oxygen vacancies. The maximum enhancement of the conductivity with illumination occurs for fully deoxygenated samples (x=6.0). The spectral dependence of the persistent photoconductivity has a pronounced peak in the UV region at ≈4.1 eV. All these observations can be understood qualitatively with a model based on the trapping of photoexcited electrons at oxygen vacancies in the Cu-O chains of REBa₂Cu₃Ox.

Original language	English (US)
Pages (from-to)	87-93
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	251
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(96)02775-2
State	Published - Apr 1997
Externally published	Yes

Keywords

High-T
Photoconductivity
Superconductors
Thin film

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Online availability

10.1016/S0925-8388(96)02775-2

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title = "Persistent photoinduced superconductivity",

abstract = "We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa2Cu3Ox thin films. It is shown that the resistivity, Hall coefficient and c-axis parameter change significantly upon illumination. All these effects require the presence of oxygen vacancies. The maximum enhancement of the conductivity with illumination occurs for fully deoxygenated samples (x=6.0). The spectral dependence of the persistent photoconductivity has a pronounced peak in the UV region at ≈4.1 eV. All these observations can be understood qualitatively with a model based on the trapping of photoexcited electrons at oxygen vacancies in the Cu-O chains of REBa2Cu3Ox.",

keywords = "High-T, Photoconductivity, Superconductors, Thin film",

author = "A. Hoffmann and J. Hasen and D. Lederman and T. Endo and Y. Bruynseraede and Schuller, {Ivan K.}",

note = "Funding Information: This paper summarizes work done at UCSD in collaboration with G, Nieva, E, Osquiguil, J. Guimpel, M. Maenh{"}mdt, B. Wuyts, M.B. Maple, V. Kudinov, and J. Santamari',i, This work was supported by the Office of Naval Research. International travel was provided by NATO,",

year = "1997",

month = apr,

doi = "10.1016/S0925-8388(96)02775-2",

language = "English (US)",

volume = "251",

pages = "87--93",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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TY - JOUR

T1 - Persistent photoinduced superconductivity

AU - Hoffmann, A.

AU - Hasen, J.

AU - Lederman, D.

AU - Endo, T.

AU - Bruynseraede, Y.

AU - Schuller, Ivan K.

N1 - Funding Information: This paper summarizes work done at UCSD in collaboration with G, Nieva, E, Osquiguil, J. Guimpel, M. Maenh"mdt, B. Wuyts, M.B. Maple, V. Kudinov, and J. Santamari',i, This work was supported by the Office of Naval Research. International travel was provided by NATO,

PY - 1997/4

Y1 - 1997/4

N2 - We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa2Cu3Ox thin films. It is shown that the resistivity, Hall coefficient and c-axis parameter change significantly upon illumination. All these effects require the presence of oxygen vacancies. The maximum enhancement of the conductivity with illumination occurs for fully deoxygenated samples (x=6.0). The spectral dependence of the persistent photoconductivity has a pronounced peak in the UV region at ≈4.1 eV. All these observations can be understood qualitatively with a model based on the trapping of photoexcited electrons at oxygen vacancies in the Cu-O chains of REBa2Cu3Ox.

AB - We review work done at UCSD on persistent photoconductivity and photoinduced superconductivity in REBa2Cu3Ox thin films. It is shown that the resistivity, Hall coefficient and c-axis parameter change significantly upon illumination. All these effects require the presence of oxygen vacancies. The maximum enhancement of the conductivity with illumination occurs for fully deoxygenated samples (x=6.0). The spectral dependence of the persistent photoconductivity has a pronounced peak in the UV region at ≈4.1 eV. All these observations can be understood qualitatively with a model based on the trapping of photoexcited electrons at oxygen vacancies in the Cu-O chains of REBa2Cu3Ox.

KW - High-T

KW - Photoconductivity

KW - Superconductors

KW - Thin film

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U2 - 10.1016/S0925-8388(96)02775-2

DO - 10.1016/S0925-8388(96)02775-2

M3 - Article

AN - SCOPUS:0031122509

SN - 0925-8388

VL - 251

SP - 87

EP - 93

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Persistent photoinduced superconductivity

Abstract

Keywords

ASJC Scopus subject areas

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