arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1002.3695cond-mat.supr-con
收藏

Ba8Si46中散射相关多能隙超导性的证据

Evidence for Scattering-Dependent Multigap Superconductivity in Ba8Si46

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

摘要:

用局域隧道谱研究了Ba_8Si_46超导体的准粒子激发谱。利用超导体-超导体结中获得的高能量分辨率,我们观察到非常规形状的隧穿电导谱,揭示了两个不同的能隙,Δ L = 1.3meV和Δ S = 0.9meV。隧道数据的分析表明,Δ L是主要的超导能隙,而Δ S,更小,更分散,诱导到一个本征非超导带的材料的带间准粒子散射。

英文摘要:

We have studied the quasiparticle excitation spectrum of the superconductor Ba8Si46 by local tunneling spectroscopy. Using high energy resolution achieved in Superconductor-Superconductor junctions we observed tunneling conductance spectra of a non-conventional shape revealing two distinct energy gaps, DeltaL = 1.3meV and DeltaS = 0.9meV. The analysis of tunneling data evidenced that DeltaL is the principal superconducting gap while DeltaS, smaller and more dispersive, is induced into an intrinsically non-superconducting band of the material by the inter-band quasiparticle scattering.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑