Mott Transition and Strange Metal in Two Dimensions: A View from Cellular Dynamical Cluster Approximation

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We introduce a Cellular Dynamical Cluster Approximation (CDCA) to study the nature of the Mott insulator-metal transition in the extended Hubbard model on a square lattice. At strong coupling, a d-wave Mott insulator is obtained. Hole doping drives a first order Mott transition to a non-Fermi (nFL) liquid metal. Remarkably, this nFL is caused by an Anderson orthogonality catastrophe at low energies due to the non-trivial competition between strong, non-local interactions and hopping. This constitutes the first explicit realisation of Anderson's Luttinger liquid idea in two dimensions. Many experimental responses in the ``strange metal'' phase found around optimal doping in cuprates are understood naturally within our approach.
4 pages, 2 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/122564

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0701585
 http://arxiv.org/abs/cond-mat/0701585

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arXiv