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Magnetic properties of interacting, disordered electron systems in d=2 dimensions

We compute the magnetic susceptibilities of interacting electrons in the presence of disorder on a two-dimensional square lattice by means of quantum Monte Carlo simulations. Clear evidence is found that at sufficiently low temperatures disorder can lead to an enhancement of the ferromagnetic susceptibility. We show that it is not related to the transition from a metal to an Anderson insulator in two dimensions, but is a rather general low temperature property of interacting, disordered electronic systems.

preprint2011arXivOpen access
Prabuddha B. ChakrabortyKrzysztof ByczukDieter Vollhardt
cond-mat.str-elcond-mat.dis-nn
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Prabuddha B. ChakrabortyKrzysztof ByczukDieter Vollhardt

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