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Anisotropy dependence of the fluctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1-xCoxAs single crystals

Title
Anisotropy dependence of the fluctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1-xCoxAs single crystals
Authors
Ahmad, DawoodChoi, Woo JaeSonora, D.Oh, Yoon SeokMosqueira, J.Park, TusonKwon, Yong Seung
DGIST Authors
Kwon, Yong Seung
Issue Date
2018-06
Citation
Scientific Reports, 8
Type
Article
Article Type
Article
Keywords
anisotropyarticlecontrolled studydopingspectroscopyLAYERED SUPERCONDUCTORSII SUPERCONDUCTORSSCALING BEHAVIORTRANSITIONFIELDYBA2CU3O7-DELTA
ISSN
2045-2322
Abstract
We investigate thermal fluctuations in terms of diamagnetism and magnetotransport in superconducting NaFe1-x Co x As single crystals with different doping levels. Results show that in the case of optimal doped and lightly overdoped (x = 0.03, 0.05) crystals the analysis in the critical as well as in the Gaussian fluctuation regions is consistent with the Ginzburg-Landau 3D fluctuation theory. However, in the case of strongly overdoped samples (x ≥ 0.07) the Ullah-Dorsey scaling of the fluctuation induced magnetoconductivity in the critical region confirms that thermal fluctuations exhibit a 3D anisotropic nature only in a narrow temperature region around T c (H). This is consistent with the fact that in these samples the fluctuation effects in the Gaussian region above T c may be described by the Lawrence-Doniach approach. Our results indicate that the anisotropy of these materials increases significantly with the doping level. © 2018 The Author(s).
URI
http://hdl.handle.net/20.500.11750/6646
DOI
10.1038/s41598-018-26939-8
Publisher
Nature Publishing Group
Related Researcher
  • Author Kwon, Yong Seung Quantum Functional Materials Laboratory
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files:
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Collection:
Department of Emerging Materials ScienceQuantum Functional Materials Laboratory1. Journal Articles


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