赝能隙态下铜氧化物的红外性质：Mitrovic-Fiorucci与Sharapov-Carbotte散射率的研究
Infrared properties of cuprates in the pseudogap state: A study of Mitrovic-Fiorucci and Sharapov-Carbotte scattering rates
AI总结：
本研究采用依赖能量的YRZ态密度，分析赝能隙相铜氧化物的Mitrovic-Fiorucci/Sharapov-Carbotte散射率，揭示了赝能隙引发的凹陷、散射率的温度依赖特性及态密度相关阈值特征，结果与实验定性相符。
摘要：
广义德鲁德模型的频率相关散射率蕴含着电子结构与散射机制的重要物理规律。在本研究中，我们采用非恒定、依赖能量的Yang-Rice-Zhang（YRZ，杨-赖斯-张）态密度，研究赝能隙相下铜氧化物的频率相关散射率（即Mitrovic-Fiorucci/Sharapov-Carbotte散射率）。首先，结合依赖能量的态密度，该散射率呈现出由赝能隙打开导致的凹陷形成图像。其次，$1/τ(ω)$随温度的演化表明：在低频下散射率随温度升高而增大，在高频下$1/τ(ω)$与温度无关。第三，我们还观测到了由玻色子态密度和电子态密度引发的阈值特征，这些特征在定性上与实验结果一致。
英文摘要：
Frequency dependent scattering rate of generalized Drude model contains important physics of the electronic structure and of scattering mechanisms. In the present investigation, we study the frequency dependent scattering rate of cuprates (Mitrovic-Fiorucci/ Sharapov-Carbotte scattering rate) in the pseudogap phase using the non-constant energy dependent Yang-Rice-Zhang (YRZ) density of states. First, with the energy dependent density of states, the scattering rate gives the picture of depression formation coming from the opening of the pseudogap. Second, the evolution of $1/τ(ω)$ with temperature shows the increase of scattering rate with the temperature at lower frequencies and the temperature independence of $1/τ(ω)$ at higher frequencies. Third, the signature of thresholds due to boson density of states and the electronic density of states also has been observed. These signatures are qualitatively in accord with the experiments.
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