Volovik effect in a highly anisotropic multiband superconductor : Experiment and theory

Volovik effect in a highly anisotropic multiband superconductor : Experiment and theory
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高度各向异性多带超导体中的 Volovik 效应:实验与理论

DOI:
10.1103/physrevb.84.184524
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发表时间:
2011
期刊:
Phys.Rev.B (Editors' suggestion)
影响因子:
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通讯作者:
他8名
他8名
中科院分区:
--
文献类型:
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作者:
Y.Wang;Y.Matsuda;他8名

文献摘要

相似文献

本文测量了铁基超导体BaFe(AsP)的比热系数(低温极限)随外加磁场的变化。我们发现,在较高的领域和一个有限的平方根行为在很低的领域的线性制度。从Volovik类到线性场依赖性的交叉可以从准经典近似中的多带计算中理解,假设间隙对空穴和类电子费米表面片具有不同的动量依赖性。
We present measurements of the specific heat coefficient(in the low-temperature limit as a function of an applied magnetic field for the Fe-based superconductor BaFe(AsP). We find both a linear regime at higher fields and a limiting square rootbehavior at very low fields. The crossover from a Volovik-liketo a linear field dependence can be understood from a multiband calculation in the quasiclassical approximation assuming gaps with different momentum dependence on the hole- and electronlike Fermi surface sheets.