论文标题
顺磁性重金属中的奇异金属近野晶格：动力大N费米子多通道方法
Strange metal in paramagnetic heavy-fermion Kondo lattice: Dynamical large-N fermionic multi-channel approach
论文作者
论文摘要
在磁相转换附近具有非常规电荷转运的奇怪金属（SM）机制已成为相关电子系统中的一个杰出的开放问题。最近，在Kondo崩溃附近的顺磁挫败重力材料中观察到一个异国量子临界SM相。我们通过动态的大N费米子多通道方法来建立一个受控的理论框架，以实现二维Kondo-Heisenberg晶格模型，其中KB过渡将重型弗里米液与费米斯自旋液体分开。随着近相波的充分考虑，我们发现与Kb相关的准线性散射率具有独特的SM行为。当存在粒子 - 孔对称性时，将临界自旋液体SM相的签名作为$ t \ rightarrow 0 $显示，$ω/t $缩放扩展到较宽范围。我们将这些特征归因于临界骨电荷（Kondo）波动的相互作用和无间隙的费米子蜘蛛。讨论了我们结果对实验的含义。
The mechanism of strange metal (SM) with unconventional charge transport near magnetic phase transitions has become an outstanding open problem in correlated electron systems. Recently, an exotic quantum critical SM phase was observed in paramagnetic frustrated heavy-fermion materials near Kondo breakdown. We establish a controlled theoretical framework to this issue via a dynamical large-N fermionic multichannel approach to the two-dimensional Kondo-Heisenberg lattice model, where KB transition separates a heavy-Fermi liquid from fermionic spin-liquid state. With Kondo fluctuations being fully considered, we find a distinct SM behavior with quasi-linear-in-temperature scattering rate associated with KB. When particle-hole symmetry is present, signatures of a critical spin-liquid SM phase as $T \rightarrow 0$ are revealed with $ω/T$ scaling extended to a wide range. We attribute these features to the interplay of critical bosonic charge (Kondo) fluctuations and gapless fermionic spinons. The implications of our results for the experiments are discussed.
