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

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Title
Ablation laser fluence as an effective parameter to control superconductivity in Ba1−xKxBiO3 films
Author(s)
Hodong Lee; Minu Kim; Oleksandr B Korneta; shinbuhn Lee; Tae Won Noh
Publication Date
2017-05
Journal
CURRENT APPLIED PHYSICS, v.17, no.5, pp.600 - 604
Publisher
ELSEVIER SCIENCE BV
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. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/3536
ISSN
1567-1739
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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