Reber T J, Zhou X, Plumb N C, Parham S, Waugh J A, Cao Y, Sun Z, Li H, Wang Q, Wen J S, Xu Z J, Gu G, Yoshida Y, Eisaki H, Arnold G B, Dessau D S
Department of Physics, University of Colorado, Boulder, CO, 80309-0390, USA.
Department of Chemistry, University of Georgia, Athens, GA, 30602, USA.
Nat Commun. 2019 Dec 16;10(1):5737. doi: 10.1038/s41467-019-13497-4.
Using angle resolved photoemission spectroscopy measurements of BiSrCaCuO over a wide range of doping levels, we present a universal form for the non-Fermi liquid electronic interactions in the nodal direction in the exotic normal state phase. It is described by a continuously varying power law exponent versus energy and temperature (hence named a Power Law Liquid or PLL), which with doping varies smoothly from a quadratic Fermi Liquid in the overdoped regime, to a linear Marginal Fermi Liquid at optimal doping, to a non-quasiparticle non-Fermi Liquid in the underdoped regime. The coupling strength is essentially constant across all regimes and is consistent with Planckian dissipation. Using the extracted PLL parameters we reproduce the experimental optics and resistivity over a wide range of doping and normal-state temperature values, including the T* pseudogap temperature scale observed in the resistivity curves. This breaks the direct link to the pseudogapping of antinodal spectral weight observed at similar temperature scales and gives an alternative direction for searches of the microscopic mechanism.
通过对不同掺杂水平的BiSrCaCuO进行角分辨光电子能谱测量，我们给出了奇异正常态相中节点方向非费米液体电子相互作用的通用形式。它由一个随能量和温度连续变化的幂律指数描述（因此称为幂律液体或PLL），随着掺杂，它从过掺杂区域的二次费米液体平滑变化到最佳掺杂时的线性边缘费米液体，再到欠掺杂区域的非准粒子非费米液体。耦合强度在所有区域基本恒定，并且与普朗克耗散一致。使用提取的PLL参数，我们在广泛的掺杂和正常态温度值范围内重现了实验光学和电阻率，包括在电阻率曲线中观察到的T*赝能隙温度标度。这打破了与在相似温度标度下观察到的反节点谱权重赝能隙的直接联系，并为微观机制的探索提供了一个替代方向。
