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arXiv 0809.1104cond-mat.str-elcond-mat.mtrl-sci
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边缘费米液体中的长波关联和输运

Long Wavelength Correlations and Transport in a Marginal Fermi Liquid

A. Shekhter, C. M. Varma

摘要:

边缘费米液体最初是作为一种现象学描述的铜氧化物的金属掺杂范围的一部分,这似乎是由波动,由于量子临界点。一个基本的结果,由于假定的波动谱的形式是,大的非弹性准粒子的费米面附近的弛豫速率是成比例的能量从化学势,$τ_i^{-1}\proptoε$。我们提出了一个微观的长波长推导的流体动力学性质在这样的情况下,由Eliashberg用于推导的朗道费米液体的流体动力学性质的程序的扩展。特别是,密度-密度和电流-电流的相关性和两者之间的关系推导出来,并连接到微观计算的频率依赖性的光学电导率与一个额外的费米液体校正因子显示如下。这里所用的方法对于任何费米子量子临界涨落问题的正确流体力学理论来说,都是非常普遍的。

英文摘要:

Marginal Fermi liquid was originally introduced as a phenomenological description of the cuprates in a part of the metallic doping range which appears to be governed by fluctuations due to a quantum-critical point. An essential result due to the form of the assumed fluctuation spectra is that the large inelastic quasiparticle relaxation rate near the Fermi-surface is proportional to the energy measured from the chemical potential, $τ_i^{-1}\proptoε$. We present a microscopic long-wavelength derivation of the hydrodynamic properties in such a situation by an extension of the procedure that Eliashberg used for the derivation of the hydrodynamic properties of a Landau-Fermi-liquid. In particular, the density-density and the current-current correlations and the relation between the two are derived, and the connection to microscopic calculations of the frequency dependence of the optical conductivity with an additional fermi-liquid correction factor shown to follow. The method used here may be necessary, quite generally, for the correct hydrodynamic theory for any problem of quantum-critical fluctuations in fermions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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