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arXiv 1407.2402cond-mat.supr-con
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无序超导体中的有限准粒子寿命

Finite quasiparticle lifetime in disordered superconductors

M. Žemlička, P. Neilinger, M. Trgala, D. Manca, M. Grajcar, P. Szabo, P. Samuely, Š. Gaži, U. Hübner, V. M. Vinokur, E. Il'ichev

摘要:

我们研究了具有$k_Fl\approx 1$的高度无序MoC超导薄膜的复电导率,其中$k_F$是费米波数,$l$是平均自由程,来自共面波导谐振器在超导转变温度$T_c$以下的宽温度范围内的实验传输特性。我们发现,原来的Mattis-Barclay模型与有限的准粒子寿命,$τ$,提供了一个完美的描述实验观察到的复电导率。我们表明,$τ$是明显减少散射效应。的散射中心的特性是独立的扫描隧道光谱发现,并同意从复杂的电导率确定的。

英文摘要:

We investigate the complex conductivity of a highly disordered MoC superconducting film with $k_Fl\approx 1$, where $k_F$ is the Fermi wavenumber and $l$ is the mean free path, derived from experimental transmission characteristics of coplanar waveguide resonators in a wide temperature range below the superconducting transition temperature $T_c$. We find that the original Mattis-Bardeen model with a finite quasiparticle lifetime, $τ$, offers a perfect description of the experimentally observed complex conductivity. We show that $τ$ is appreciably reduced by scattering effects. Characteristics of the scattering centers are independently found by the scanning tunneling spectroscopy and agree with those determined from the complex conductivity.

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。

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