Competition between Anderson localization and antiferromagnetism in correlated lattice fermion systems with disorder

Details Competition between Anderson localization and antiferromagnetism in correlated lattice fermion systems with disorder Competition between Anderson localization and antiferromagnetism in correlated lattice fermion systems with disorder

2008-10-16

arxiv.org/abs/0810.2958v1

Phys. Rev. Lett. 102, 146403 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.146403

The magnetic ground state phase diagram of the disordered Hubbard model at half-filling is computed in dynamical mean-field theory supplemented with the spin resolved, typical local density of states. The competition between many-body correlations and disorder is found to stabilize paramagnetic and antiferromagnetic metallic phases at weak interactions. Strong disorder leads to Anderson localization of the electrons and suppresses the antiferromagnetic long-range order. Slater and Heisenberg antiferromagnets respond characteristically different to disorder. The results can be tested with cold fermionic atoms loaded into optical lattices.

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