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

Title
Ablation laser fluence as an effective parameter to control superconductivity in Ba1-xKxBiO3 films
Author(s)
Lee, HodongKim, MinuKorneta, Oleksandr B.Lee, ShinbuhmNoh, Tae Won
DGIST Authors
Lee, HodongKim, MinuKorneta, Oleksandr B.Lee, ShinbuhmNoh, Tae Won
Issued Date
2017-05
Type
Article
Article Type
Article
Author Keywords
Perovskite oxide thin filmPulsed laser depositionLaser fluenceSuperconductivity
Keywords
THIN-FILMSELECTRICAL-PROPERTIESDEPOSITIONGROWTHSYSTEMSTOICHIOMETRYTEMPERATUREPEROVSKITETRANSITIONEPITAXY
ISSN
1567-1739
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
http://hdl.handle.net/20.500.11750/4183
DOI
10.1016/j.cap.2017.02.014
Publisher
한국물리학회
Related Researcher
  • 이신범 Lee, Shinbuhm 화학물리학과
  • Research Interests Multifunctional films; Experimental condensed matter physics
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Appears in Collections:
Department of Physics and Chemistry Semiconductor Energy Sensor Laboratory 1. Journal Articles

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