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Non-magnetic impurity effect in two-gap superconductor Lu2Fe3Si5

โœ Scribed by H. Hidaka; Y. Nakajima; T. Tamegai

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
393 KB
Volume
469
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

We report detailed study of non-magnetic impurity effects in a two-gap superconductor Lu 2 Fe 3 Si 5 by replacing Lu with Sc. We find that the superconducting transition temperature T c is drastically suppressed by slight substitution of Sc, while lattice constants change linearly with the substitution. These results strongly indicate that a slight substitution of Sc increases the inter-band scattering and causes averaging the amplitude of two gaps, which leads to the drastic suppression of T c .

๐Ÿ“œ SIMILAR VOLUMES

Specific heat study of ternary iron-sili
Specific heat study of ternary iron-silicide superconductor Lu2Fe3Si5: Evidence for two-gap superconductivity
โœ Y. Nakajima; G.J. Li; T. Tamegai ๐Ÿ“‚ Article ๐Ÿ“… 2008 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 257 KB

We report the low temperature specific heat of ternary iron-silicide superconductor Lu 2 Fe 3 Si 5 with T c = 6 K down to $T c /20. We find that a normalized specific heat jump at T c , DC/c n T c , is smaller than BCS value of 1.43. We also find that the specific heat divided by temperature C/T sho