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Current-density functional for disordered systems
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DOI：10.1103/PhysRevB.68.014202.png)
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摘要
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The effective action for the current and density is shown to satisfy an evolution equation, the functional generalization of Callan-Symanzik equation. The solution describes the dependence of the one-particle irreducible vertex functions on the strength of the quenched disorder and the annealed Coulomb interaction. The result is nonperturbative, no small parameter is assumed. The ac conductivity is obtained by the numerical solution of the evolution equation on finite lattices in the absence of the Coulomb interaction. The static limit is performed and the conductivity is found to be vanishing beyond a certain threshold of the impurity strength.
Keyword:
RENORMALIZATION-GROUP
CONDUCTIVITY
LOCALIZATION
EXPANSION
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3.7
论文数:
15.4W
被引数:
41.0W
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