铜氧化物的非相干中红外电荷激发和光电发射谱中的高能异常
Incoherent mid-infrared charge excitation and the high energy anomaly in the photoemission spectra of cuprates
摘要：
半唯象模型的基础上，有人认为，在最近的光电发射实验观察到的高能量异常铜氧化物是由相互作用的过阻尼玻色子模式在中红外区的光谱。光学电导率的分析允许将这种激发与大多数高Tc材料和一些其他钙钛矿报道的非相干电荷响应联系起来。我们表明，它的大阻尼是一个重要的功能负责的“瀑布”的色散和线宽的光谱权重。
英文摘要：
On the basis of a semi-phenomenological model, it is argued that the high energy anomaly observed in recent photoemission experiments on cuprates is caused by interaction with an overdamped bosonic mode in the mid-infrared region of the spectrum. Analysis of optical conductivity allows to connect this excitation to the incoherent charge response reported for the majority of high Tc materials and some other perovskites. We show that its large damping is an essential feature responsible for the "waterfall" dispersion and linewidth of the spectral weight.
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