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arXiv 1007.0857cond-mat.supr-con
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NbSe2单晶双带超导态的实验证据

Experimental evidence for a two-band superconducting state of NbSe2 single crystals

M. Zehetmayer, H. W. Weber

摘要:

我们报告的测量和详细的分析超导NbSe 2单晶的可逆磁化。通过比较实验数据与Ginzburg Landau理论,我们表明,在NbSe 2的超导电性不能解释的各向异性单带,但由一个多带的情况。应用一个简单的两带模型揭示了基本的混合态参数,这是非常不同的两个波段。我们确定了一个强各向异性带,确定在高磁场的属性,和第二个几乎各向同性带,占主导地位,在低场。我们的方法是非常适合于区分各向异性的单带多带超导在各种材料。

英文摘要:

We report on measurements and a detailed analysis of the reversible magnetization of superconducting NbSe2 single crystals. By comparing the experimental data with Ginzburg Landau theory we show that superconductivity in NbSe2 cannot be explained by an anisotropic single-band, but by a multi-band scenario. Applying a simple two-band model reveals the basic mixed-state parameters, which are quite different in the two bands. We identify a strongly anisotropic band that determines the properties at high magnetic fields, and a second almost isotropic band that dominates at low fields. Our method is well suited for distinguishing anisotropic single-band from multi-band superconductivity in various materials.

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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