Gauge-invariant response functions in algebraic Fermi liquids
Gauge-invariant response functions in algebraic Fermi liquids
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DOI：
10.1103/physrevb.68.024508
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发表时间：
2002-11
影响因子：
3.7
通讯作者：
M. Franz;T. Pereg-Barnea;D. Sheehy;Z. Tes̆anović
中科院分区：
文献类型：
--
作者：
M. Franz;T. Pereg-Barnea;D. Sheehy;Z. Tes̆anović
一种方法的开发，允许一个简单的评价耦合到规范场的费米子的两个回路的响应函数。我们采用这种方法来研究规范不变的响应函数的代数费米液体，一个非费米液体状态提出来描述赝能隙相在QED 3理论的铜氧化物超导体。交错自旋磁化率被发现表现出一个特征的反常维数指数h4，而其他的自旋磁化率表现出一个符合守恒定律的行为，
A method is developed that permits a simple evaluation of two-loop response functions for fermions coupled to a gauge field. We employ this method to study the gauge-invariant response functions in the algebraic Fermi liquid, a non-Fermi liquid state proposed to describe the pseudogap phase in the QED3 theory of cuprate superconductors. The staggered spin susceptibility is found to exhibit a characteristic anomalous dimension exponent h 4, while other correlators show a behavior consistent with the conservation laws imposed by the