Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox

Denise C. Chew; John F. Federici; J. Gutierrez-Solana; G. Molina; William Savin; W. D. Wilber

Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox

Denise C. Chew, John F. Federici, J. Gutierrez-Solana, G. Molina, William Savin, W. D. Wilber

Physics

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa ₂Cu ₃O _x. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa ₂Cu ₃O _x thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F ⁺-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.

Original language	English (US)
Pages (from-to)	654-663
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2696
Issue number	2/-
State	Published - 1996
Event	Spectroscopic Studies of Superconductors. Part 2 (of 2) - San Jose, CA, USA Duration: Jan 29 1996 → Feb 1 1996

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Cite this

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title = "Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox",

abstract = "Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa 2Cu 3O x. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa 2Cu 3O x thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F +-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.",

author = "Chew, {Denise C.} and Federici, {John F.} and J. Gutierrez-Solana and G. Molina and William Savin and Wilber, {W. D.}",

year = "1996",

language = "English (US)",

volume = "2696 ",

pages = "654--663",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "SPIE",

number = "2/-",

note = "Spectroscopic Studies of Superconductors. Part 2 (of 2) ; Conference date: 29-01-1996 Through 01-02-1996",

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TY - JOUR

T1 - Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox

AU - Chew, Denise C.

AU - Federici, John F.

AU - Gutierrez-Solana, J.

AU - Molina, G.

AU - Savin, William

AU - Wilber, W. D.

PY - 1996

Y1 - 1996

N2 - Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa 2Cu 3O x. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa 2Cu 3O x thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F +-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.

AB - Persistent photoconductivity and photoinduced superconductivity have been previously observed in various stoichiometries of YBa 2Cu 3O x. The physical mechanism which is responsible for these effects is still under debate. Through an investigation of laser ablated YBa 2Cu 3O x thin film compositions, photoluminescence spectra and infrared spectroscopy, the possibility that the mechanism may be defect related has been supported. A correlation between photoluminescence spectra and wavelength dependence support an oxygen defect model of photoinduced persistent conductivity and superconductivity in which the oxygen vacancies act as weakly luminescent F-centers and F +-centers under illumination. Upon infrared illumination the trapped electrons are photoexcited resulting in a partial quenching of the persistent photoconductivity state.

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M3 - Conference article

AN - SCOPUS:0030405268

SN - 0277-786X

VL - 2696

SP - 654

EP - 663

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

IS - 2/-

T2 - Spectroscopic Studies of Superconductors. Part 2 (of 2)

Y2 - 29 January 1996 through 1 February 1996

ER -

Defect mechanism of photoinduced superconductivity in YBa2Cu3Ox

Abstract

All Science Journal Classification (ASJC) codes

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