Thermal fluctuation conductivity and dimensionality in iron-based superconductors  

作　　者：王蕊 李定平 

机构地区：[1]School of Physics, Peking University, Beijing 100871, China [2]Collaborative Innovation Center of Quantum Mzltter,Beijing 100871, China

出　　处：《Chinese Physics B》2016年第9期533-539,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11274018)

摘　　要：The time-dependent Ginzburg–Landau Lawrence–Doniach model is used to investigate the superconducting fluctuation electrical conductivities.The theoretical result based on the self-consistent Gaussian approximation is used to fit the transport measurement data of iron-based superconductors F-doped La OFe As and Ba Fe_（2-x）Ni_xAs_2.We demonstrate that La OFe As shows layered behavior,while Ba Fe_（2-x）Ni_xAs_2 is more of a 3D feature.The conductivity in the region near Tc is well described by the theoretical formula.The time-dependent Ginzburg–Landau Lawrence–Doniach model is used to investigate the superconducting fluctuation electrical conductivities.The theoretical result based on the self-consistent Gaussian approximation is used to fit the transport measurement data of iron-based superconductors F-doped La OFe As and Ba Fe_（2-x）Ni_xAs_2.We demonstrate that La OFe As shows layered behavior,while Ba Fe_（2-x）Ni_xAs_2 is more of a 3D feature.The conductivity in the region near Tc is well described by the theoretical formula.

关 键 词：time-dependent Ginzburg–Landau Lawrence–Doniach model iron-based superconductors conductivity dimensionality 

分 类 号：TM26[一般工业技术—材料科学与工程]