Effect of Fermi Surface Topology on Inter-Layer Magnetoresistance in Layered Multiband Systems: Application to LaFeAsO1-xFx
Effect of Fermi Surface Topology on Inter-Layer Magnetoresistance in Layered Multiband Systems: Application to LaFeAsO1-xFx
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DOI：
10.1143/jpsj.78.114702
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发表时间：
2009-06
影响因子：
1.7
通讯作者：
T. Morinari;Hiroki Nakamura;M. Machida;T. Tohyama
中科院分区：
文献类型：
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作者：
T. Morinari;Hiroki Nakamura;M. Machida;T. Tohyama
在层状单能带系统中，层间电导率取决于面内磁场的方向，并且当磁场垂直于费米表面的平坦区域时取最大值。将这一已知结果扩展到多带系统，我们提出了一项实验来提取有关其费米表面拓扑的信息。我们讨论了该公式在 FeAs 基超导体 LaFeAsO 1- x F x 中的应用。我们表明，母体化合物中的磁有序态通过层间电导率的振荡周期与顺磁态清楚地区分开来。我们证明，通过改变掺杂浓度，费米表面拓扑的演化反映在层间电导率振荡模式上。
In layered single band systems, the interlayer conductivity depends on the orientation of the in-plane magnetic field and takes maximum values when the magnetic field is perpendicular to flat regions of the Fermi surface. Extending this known results to multi-band systems, we propose an experiment to extract information about their Fermi surface topology. We discuss application of the formula to a FeAs-based superconductor, LaFeAsO 1- x F x . We show that the magnetically ordered state in the parent compound is clearly distinguished from the paramagnetic state by the oscillation period in the interlayer conductivity. We demonstrate that evolution of the Fermi surface topology by changing the doping concentration is reflected to the interlayer conductivity oscillation patterns.