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Renormalized transport properties of randomly gapped two-dimensional Dirac fermions

机译:带间隙的二维狄拉克费米子的重正化输运性质

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摘要

We investigate the scaling properties of the recently acquired fermionic nonlinear a model which controls gapless diffusive modes in a two-dimensional disordered system of Dirac electrons beyond charge neutrality. The transport on large scales is governed by a renormalizable nonlocal field theory. For zero-mean random gap, it is characterized by the absence of a dynamic gap generation and a scale-invariant diffusion coefficient. The β function of the dc conductivity, computed for this model, is in perfect agreement with numerical results obtained previously.
机译:我们研究了最近获得的铁电非线性模型的定标性质,该模型控制二维Dirac电子无序系统中的无间隙扩散模式,超越电荷中性。大规模的运输受可归一化的非局部场理论支配。对于零均值的随机间隙,其特征在于没有动态间隙生成和尺度不变的扩散系数。为该模型计算的直流电导率的β函数与先前获得的数值结果完全吻合。

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