RT Journal Article
T1 Anisotropy dependence of the fuctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1−xCoxAs single crystals
A1 Ahmad, D.
A1 Choi, W.J.
A1 Sóñora Vidal, Daniel
A1 Oh, Yoon Seok
A1 Mosqueira Rey, Jesús Manuel
A1 Park, Tuson
A1 Kwon, Yong Seung
A1 Choi, 
K1 Superconducting properties and materials
AB We investigate thermal fluctuations in terms of diamagnetism and magnetotransport in superconducting NaFe1−xCo 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 Tc may be described by the Lawrence-Doniach approach. Our results indicate that the anisotropy of these materials increases significantly with the doping level
PB Nature Publishing Group
YR 2018
FD 2018
LK http://hdl.handle.net/10347/22056
UL http://hdl.handle.net/10347/22056
LA eng
NO Ahmad, D., Choi, W.J., Sóñora, D. et al. Anisotropy dependence of the fluctuation spectroscopy in the critical and gaussian regimes in superconducting NaFe1−xCo x As single crystals. Sci Rep 8, 8556 (2018). https://doi.org/10.1038/s41598-018-26939-8
NO YSK was supported by the NRF grant funded by the Ministry of Science, ICT and Future Planning (2015M2B2A9028507, 2016R1A2B4012672). DA and YSO was partially supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2017R1A4A1015323). DS and JM acknowledge financial support from Project No. FIS2016-79109-P (AEI/FEDER, UE). TP was supported by the NRF grant funded by the Ministry of Science, ICT and Future Planning of Korea (No. 2012R1A3A2048816). YSO was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2015R1C1A1A01055964)
DS Minerva
RD 24 abr 2026