Two-gap superconductivity in single crystal Lu$_2$Fe$_3$Si$_5$ from penetration depth measurements

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dc.creatorGordon, R.
dc.creatorVannette, M. D.
dc.creatorMartin, C.
dc.creatorNakajima, Y.
dc.creatorTamegai, T.
dc.creatorProzorov, R.
dc.date2008-01-01
dc.date.accessioned2026-07-07T12:35:56Z
dc.date.available2026-07-07T12:35:56Z
dc.descriptionSingle crystal of Lu$_2$Fe$_3$Si$_5$ was studied with the tunnel-diode resonator technique in Meissner and mixed states. Temperature dependence of the superfluid density provides strong evidence for the two-gap superconductivity with almost equal contributions from each gap of magnitudes $Δ_1/k_BT_c=1.86$ and $Δ_1/k_BT_c=0.54$. In the vortex state, pinning strength shows unusually strong temperature dependence and is non-monotonic with the magnetic field (peak effect). The irreversibility line is sharply defined and is quite distant from the $H_{c2}(T)$, which hints on to enhanced vortex fluctuations in this two-gap system. Altogether our findings provide strong electromagnetic - measurements support to the two-gap superconductivity in Lu$_2$Fe$_3$Si$_5$ previously suggested from specific heat measurements.
dc.identifierhttps://arxiv.org/abs/0801.0269
dc.identifierhttp://arxiv.org/abs/0801.0269
dc.identifierPhys. Rev. B 78, 024514 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.024514
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217928
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleTwo-gap superconductivity in single crystal Lu$_2$Fe$_3$Si$_5$ from penetration depth measurements
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