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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
Author(s)
Ahmad, DawoodChoi, Woo JaeSonora, D.Oh, Yoon SeokMosqueira, J.Park, TusonKwon, Yong Seung
Issued Date
2018-06
Citation
Scientific Reports, v.8, no.1
Type
Article
Keywords
LAYERED 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
  • 권용성 Kwon, Yong Seung
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files in This Item:
000434011100043.pdf

000434011100043.pdf

기타 데이터 / 1.94 MB / Adobe PDF download
Appears in Collections:
Department of Physics and Chemistry Quantum Functional Materials Laboratory 1. Journal Articles

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