Disorder-Induced Stabilization of the Pseudogap in Strongly Correlated Systems

Details Disorder-Induced Stabilization of the Pseudogap in Strongly Correlated Systems Disorder-Induced Stabilization of the Pseudogap in Strongly Correlated Systems

2008-04-28

arxiv.org/abs/0804.4463v1

Physics

Condensed Matter

Strongly Correlated Electrons

4.2 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.086401

The interplay of strong interaction and strong disorder, as contained in the Anderson-Hubbard model, is addressed using two non-perturbative numerical methods: the Lanczos algorithm in the grand canonical ensemble at zero temperature and Quantum Monte Carlo. We find distinctive evidence for a zero-energy anomaly which is robust upon variation of doping, disorder and interaction strength. Its similarities to, and differences from, pseudogap formation in other contexts, including perturbative treatments of interactions and disorder, classical theories of localized charges, and in the clean Hubbard model, are discussed.

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