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:
影响因子:
--
通讯作者:
他8名
中科院分区:
文献类型:
--
作者:
Y.Wang;Y.Matsuda;他8名
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.