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arXiv 1808.02145hep-th
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掺杂全息超导体中的奇异金属交叉

Strange metal crossover in the doped holographic superconductor

Gastón Giordano, Nicolás Grandi, Adrián Lugo, Rodrigo Soto-Garrido

摘要:

在最近的一篇论文中,Kiritsis和Li提出了一个全息模型来研究全息超导体中有限掺杂下不同阶数之间的竞争。本文将费米子引入到该模型中,研究了零温和有限温下正常相的费米子谱函数。结合分析和数值计算的方法,我们发现有一个交叉从一个奇怪的金属短寿命的激发在小掺杂,到费米液体定义良好的准粒子在大掺杂。临界掺杂,在该激发成为长寿命的增加与温度。出现的相图在性质上类似于高温超导体的相图。

英文摘要:

In a recent paper, Kiritsis and Li presented a holographic model to study the competition between different orders at finite doping in holographic superconductors. In the present work, we introduce fermions into such model and study the fermionic spectral functions in the normal phase at zero and finite temperatures. Combining analytic and numerical methods, we found that there is a crossover from a strange metal with short lived excitations at small doping, into a Fermi liquid with well defined quasiparticles at large doping. The critical doping at which excitations becomes long lived increases with temperature. The emerging phase diagram is qualitatively similar to that of High Temperature Superconductors.

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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