Origin of the Drude peak and of zero sound in probe brane holography
Origin of the Drude peak and of zero sound in probe brane holography
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DOI：
10.1016/j.physletb.2017.10.023
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发表时间：
2017-09
影响因子：
4.4
通讯作者：
Chi-Fang Chen;A. Lucas
中科院分区：
文献类型：
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作者：
Chi-Fang Chen;A. Lucas
在某些奇异金属全息探针膜模型中，在零温度下，电荷电流算符在线性响应内是守恒的。在小而有限的温度下，我们分析表明，该电流的弱非守恒导致了集体“零声”模式和电导率的德鲁德峰。这同时解决了关于探针膜理论的两个突出难题。当前算子本身的非线性动力学表现出质的不同。
At zero temperature, the charge current operator appears to be conserved, within linear response, in certain holographic probe brane models of strange metals. At small but finite temperature, we analytically show that the weak non-conservation of this current leads to both a collective “zero sound” mode and a Drude peak in the electrical conductivity. This simultaneously resolves two outstanding puzzles about probe brane theories. The nonlinear dynamics of the current operator itself appears qualitatively different.