论文标题
SR2RUO4中的传播电荷载体等离子体
Propagating charge carrier plasmon in Sr2RuO4
论文作者
论文摘要
我们报告了通过透射电子损失光谱学SR2RUO4中电荷载体等离子体激发的研究。特别是，我们介绍了等离子体分散及其宽度作为动量转移的函数的结果。可以在RPA计算的框架中使用单纯化的紧密结合带结构在RPA计算的框架中进行定性解释。等离子体的恒定长波长宽度表明，它是由衰减到频段过渡而不是量子临界波动引起的。这些对原型不良金属系统的研究的结果表明，1 eV附近的长波长等离子体激发是由弹性准颗粒引起的，并且不受相关效应的影响。
We report on studies of charge carrier plasmon excitations in Sr2RuO4 by transmission Electron Energy-Loss Spectroscopy. In particular, we present results on the plasmon dispersion and its width as a function of momentum transfer. The dispersion can be qualitatively explained in the framework of RPA calculations, using an unrenormalized tight-binding band structure. The constant long-wavelength width of the plasmon indicates, that it is caused by a decay into inter-band transition and not by quantum critical fluctuations. The results from these studies on a prototypical bad metal system show that the long-wavelength plasmon excitations near 1 eV are caused by resilient quasiparticles and are not influenced by correlation effects.
