Evidence for Scattering-Dependent Multigap Superconductivity in Ba8Si46 - Condensed Matter > SuperconductivityReport as inadecuate




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Abstract: We have studied the quasiparticle excitation spectrum of the superconductorBa8Si46 by local tunneling spectroscopy. Using high energy resolution achievedin Superconductor-Superconductor junctions we observed tunneling conductancespectra of a non-conventional shape revealing two distinct energy gaps, DeltaL= 1.3meV and DeltaS = 0.9meV. The analysis of tunneling data evidenced thatDeltaL is the principal superconducting gap while DeltaS, smaller and moredispersive, is induced into an intrinsically non-superconducting band of thematerial by the inter-band quasiparticle scattering.



Author: Yves Noat, Tristan Cren, Pierre Toulemonde, Alfonso San Miguel, Francois Debontridder, Vincent Dubost, Dimitri Roditchev

Source: https://arxiv.org/



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