论文标题
磁场缩放缩放，混乱，“热点”和$ t $ - 线性电阻率$ _2 $（as $ _ {1-x} $ p $ _x $）$ _ 2 $
Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$-linear resistivity in BaFe$_2$(As$_{1-x}$P$_x$)$_2$
论文作者
论文摘要
$ h $ - 线性磁磁度在场和温度中的缩放以不足（x = 0.19）和最佳掺杂（x = 0.31）〜bafe $ _2 $（AS $ _ {1-x} $ p $ _x $）$ _ 2 $ _ 2 $。我们在存在强烈各向异性的准粒子光谱和由于抗铁磁性引起的散射时间的情况下基于轨道模型分析数据。磁磁性由称为“热点”的费米表面的小区域的特性主导，其中抗铁磁激发会引起大型的准粒子散射率。得出了近似温度磁场比例关系，并证明与实验数据一致。我们认为这些结果将线性中温电阻率的起源与由抗铁磁临界点产生的热点相关，而磁倍率测量值为量化此链接提供了途径。
The scaling of $H$-linear magnetoresistance in field and temperature was measured in under-doped (x = 0.19) and optimally-doped (x=0.31)~BaFe$_2$(As$_{1-x}$P$_x$)$_2$. We analyze the data based on an orbital model in the presence of strongly anisotropic quasiparticle spectra and scattering time due to antiferromagnetism. The magnetoresistance is dominated by the properties of small regions of the Fermi surface called `hot spots' where antiferromagnetic excitations induce a large quasiparticle scattering rate. Approximate temperature-magnetic field scaling relations are derived and shown to be consistent with the experimental data. We argue that these results link the origin of linear-in-temperature resistivity to hot spots arising from an antiferromagnetic critical point, and magnetoresistance measurements provide a route to quantify this link.
