Ablation laser fluence as an effective parameter to control superconductivity in Ba1−xKxBiO3 films

Hodong Lee; Minu Kim; O. B. Korneta; Shinbuhm Lee; Tae Won Noh

doi:10.1016/j.cap.2017.02.014

Ablation laser fluence as an effective parameter to control superconductivity in Ba_1−xK_xBiO₃ films

Hodong Lee
, Minu Kim
, O. B. Korneta
, Shinbuhm Lee
, Tae Won Noh

Department of Physics and Chemistry

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

1 Scopus citations

Abstract

Potassium doping in insulating BaBiO₃ induces superconductivity, with high superconducting transition temperatures, T_c, of up to 31 K in bulk. We investigated growth control of superconducting properties of BKBO films, by varying laser fluence using pulsed laser deposition technique. As cation stoichiometry, especially potassium concentration in BKBO films, was sensitively changed with laser fluence, we were able to precisely control T_c of BKBO films. Following the trend of the bulk phase diagram, T_c showed the highest value of 24.5 ± 0.5 K at the optimal stoichiometry. This result can provide optimal guidance for the synthesis of high-quality BKBO films, and demonstrates the effectiveness of laser fluence to study emerging superconducting phenomena in PLD-grown complex oxide thin films.

Original language	English
Pages (from-to)	600-604
Number of pages	5
Journal	Current Applied Physics
Volume	17
Issue number	5
DOIs	https://doi.org/10.1016/j.cap.2017.02.014
State	Published - 1 May 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Laser fluence
Perovskite oxide thin film
Pulsed laser deposition
Superconductivity

Access to Document

10.1016/j.cap.2017.02.014

Cite this

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title = "Ablation laser fluence as an effective parameter to control superconductivity in Ba1−xKxBiO3 films",

abstract = "Potassium doping in insulating BaBiO3 induces superconductivity, with high superconducting transition temperatures, Tc, of up to 31 K in bulk. We investigated growth control of superconducting properties of BKBO films, by varying laser fluence using pulsed laser deposition technique. As cation stoichiometry, especially potassium concentration in BKBO films, was sensitively changed with laser fluence, we were able to precisely control Tc of BKBO films. Following the trend of the bulk phase diagram, Tc showed the highest value of 24.5 ± 0.5 K at the optimal stoichiometry. This result can provide optimal guidance for the synthesis of high-quality BKBO films, and demonstrates the effectiveness of laser fluence to study emerging superconducting phenomena in PLD-grown complex oxide thin films.",

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AU - Korneta, O. B.

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AU - Noh, Tae Won

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AB - Potassium doping in insulating BaBiO3 induces superconductivity, with high superconducting transition temperatures, Tc, of up to 31 K in bulk. We investigated growth control of superconducting properties of BKBO films, by varying laser fluence using pulsed laser deposition technique. As cation stoichiometry, especially potassium concentration in BKBO films, was sensitively changed with laser fluence, we were able to precisely control Tc of BKBO films. Following the trend of the bulk phase diagram, Tc showed the highest value of 24.5 ± 0.5 K at the optimal stoichiometry. This result can provide optimal guidance for the synthesis of high-quality BKBO films, and demonstrates the effectiveness of laser fluence to study emerging superconducting phenomena in PLD-grown complex oxide thin films.

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