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Anisotropy dependence of the fluctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1-xCoxAs single crystals
- Anisotropy dependence of the fluctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1-xCoxAs single crystals
- Ahmad, Dawood; Choi, Woo Jae; Sonora, D.; Oh, Yoon Seok; Mosqueira, J.; Park, Tuson; Kwon, Yong Seung
- DGIST Authors
- Kwon, Yong Seung
- Issue Date
- Scientific Reports, 8
- Article Type
- anisotropy; article; controlled study; doping; spectroscopy; LAYERED SUPERCONDUCTORS; II SUPERCONDUCTORS; SCALING BEHAVIOR; TRANSITION; FIELD; YBA2CU3O7-DELTA
- 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).
- Nature Publishing Group
- Related Researcher
Kwon, Yong Seung
Quantum Functional Materials Laboratory
High Tc Superconductors and magnetic materials; Thermoelectric Materials
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- Department of Emerging Materials ScienceQuantum Functional Materials Laboratory1. Journal Articles
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