Non-magnetic impurity effect on suppression of Tc and gap evolution in the two-gap superconductor Lu2Fe3Si5

Nakajima, Yasuyuki; Hidaka, H.; Tamegai, T.

doi:10.1016/j.physc.2012.02.022

Cited by 2 publications

(1 citation statement)

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“…On the other hand, for a superconductor with nodes in the gap, for example d-wave superconductors with line nodes, Volovik et al 19) pointed out that supercurrents In our case, the slope of ( ) H γ Δ at low field is larger than that at higher field, which has been witnessed in two-gap superconductors such as MgB 2 20) and 23) quite different from the similar compound Lu 2 Fe 3 Si 5 , which is already proved to be a two-gap superconductor, 9,24) and T c is rapidly suppressed by nonmagnetic impurities. 25,26) In the case of anisotropic s-wave, Nakai et al 27) theoretically revealed that ( ) H γ shows a crossover from H linear dependence at low field to H at high fields. Thus we replot the 13) together with that from Sc 5 Ir 4 Si 10 single crystal.…”

Section: Resultsmentioning

confidence: 99%

Specific Heat and Upper Critical Field of Sc₅Ir₄Si₁₀Superconductor

Sun

Ding

et al. 2013

J. Phys. Soc. Jpn.

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Temperature and magnetic field dependent specific heat of textured Sc 5 Ir 4 Si 10 superconductor was investigated in detail. Based on the fitting of zero-field electronic specific heat by different gap structures as well as the discussion on field-induced specific heat coefficient, Sc 5 Ir 4 Si 10 is proved to be an anisotropic s-wave superconductor with a gap anisotropy, min max / Δ Δ , of 0.53. The anisotropy of upper critical field suggests the weakly one-dimensional Fermi surface, and the value is consistent with the gap anisotropy result obtained from the specific heat data.

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