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Weak localization i...
Weak localization in FeSe1-xTex superconducting thin films
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Chang, H. H. (author)
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Luo, J. Y. (author)
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Wu, C. T. (author)
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Hsu, F. C. (author)
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Huang, T. W. (author)
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- Wu, Phillip (author)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Wu, M. K. (author)
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Wang, M. J. (author)
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(creator_code:org_t)
- 2012-01-20
- 2012
- English.
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In: Superconductor Science & Technology. - : IOP Publishing. - 0953-2048 .- 1361-6668. ; 25:3
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http://dx.doi.org/10...
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Abstract
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- We have investigated the magneto-resistivity (MR) of FeSe1-xTex superconducting films on MgO substrate. The MR of pure FeSe and slightly Te-substituted films demonstrates regular Lorentz-type magnetic field dependence, MR similar to B-2. In highly Te-substituted samples, however, negative MR contribution due to the weak-localization effect gradually dominates at low temperature, which is consistent with the evolution of the temperature dependence of resistivity from a metallic to a weakly semiconductor-like behavior. Furthermore, the negative MR weakens and turns positive as temperature approaches the superconducting transition temperature, which is evidence for the Maki-Thompson correction in the weak-localization regime. The experimental data can be described very well by the weak-localization theory with the existence of scattering by some magnetic moments. The fitting parameters demonstrate that disorder most likely comes from the excess iron.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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