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arXiv 1003.1728hep-thcond-mat.str-el
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从黑洞到奇异金属

From black holes to strange metals

Thomas Faulkner, Nabil Iqbal, Hong Liu, John McGreevy, David Vegh

摘要:

自80年代中期以来,已经积累了大量的金属材料,其热力学和输运性质与费米液体理论预测的有很大不同。这些所谓的非费米液体的例子包括高转变温度的铜酸盐的奇怪金属相,以及接近量子相变的重费米子系统。我们报告一类非费米液体发现使用规范/重力对偶。这些非费米液体的低能量行为被证明是由一个非平凡的红外(IR)固定点,表现出非解析标度行为,只有在时间方向。在这一类中,我们找到了单粒子光谱函数和输运行为类似于奇怪金属的例子。特别地,费米面对电导率的贡献与温度成反比。在我们的治疗中,这些属性可以被理解为控制的标度尺寸的费米子运营商在紧急红外固定点。

英文摘要:

Since the mid-eighties there has been an accumulation of metallic materials whose thermodynamic and transport properties differ significantly from those predicted by Fermi liquid theory. Examples of these so-called non-Fermi liquids include the strange metal phase of high transition temperature cuprates, and heavy fermion systems near a quantum phase transition. We report on a class of non-Fermi liquids discovered using gauge/gravity duality. The low energy behavior of these non-Fermi liquids is shown to be governed by a nontrivial infrared (IR) fixed point which exhibits nonanalytic scaling behavior only in the temporal direction. Within this class we find examples whose single-particle spectral function and transport behavior resemble those of strange metals. In particular, the contribution from the Fermi surface to the conductivity is inversely proportional to the temperature. In our treatment these properties can be understood as being controlled by the scaling dimension of the fermion operator in the emergent IR fixed point.

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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