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首页> 外文期刊>Physical review >Pressure Dependence Of The Single Particle Excitation In The Charge-density-wave Cete_3 System
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Pressure Dependence Of The Single Particle Excitation In The Charge-density-wave Cete_3 System

机译：电荷密度波Cete_3系统中单粒子激发的压力依赖性

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We present data on the pressure dependence at 300 K of the optical reflectivity of CeTe_3, which undergoes a charge-density-wave (CDW) phase transition well above room temperature. The collected data cover an unprecedented broad spectral range from the infrared up to the ultraviolet, which allows a robust determination of the gap as well as of the fraction of the Fermi surface affected by the formation of the CDW condensate. Upon compressing the lattice there is a progressive closing of the gap, inducing a transfer of spectral weight from the gap feature into the Drude component. At frequencies above the CDW gap we also identify a power-law behavior, consistent with findings along the RTe_3 series (i.e., chemical pressure) and suggestive of a Tomonaga-Luttinger liquid scenario at high-energy scales. This set of data is placed in the context of our previous investigations of this class of materials and allows us to revisit important concepts for the physics of CDW state in layeredlike two-dimensional systems.
机译：我们提供的数据与CeTe_3的光反射率在300 K时的压力相关性，CeTe_3的电荷密度波（CDW）相变远高于室温。收集的数据涵盖了从红外到紫外线的前所未有的宽光谱范围，从而可以可靠地确定间隙以及受CDW冷凝物形成影响的费米表面分数。压缩晶格后，间隙逐渐闭合，从而导致光谱权重从间隙特征转移到Drude分量中。在CDW间隙以上的频率处，我们还确定了幂律行为，这与沿RTe_3系列的发现（即化学压力）一致，并暗示了高能规模下的Tomonaga-Luttinger液体情景。这组数据放在我们之前对此类材料的研究的背景下，使我们能够重新审视类似二维系统中CDW态物理的重要概念。

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