Thursday, June 6, 2013

1306.1044 (Giuseppe Della Valle et al.)

Field-induced ferromagnetism in one-dimensional tight-binding lattices    [PDF]

Giuseppe Della Valle, Stefano Longhi
We theoretically show the possibility to induce magnetic ordering in non-magnetic one-dimensional systems of strongly interacting electrons hopping on a tight-binding lattice. Our analysis is provided within the framework of the t1-t2 Hubbard Model, assuming non-zero second neighbor hopping rate. It is shown that a high-frequency electric field can be exploited to induce artificial ferromagnetism and eventually control anti-ferromagnetic/ferromagnetic phase transition. Our analysis is validated by numerical simulations in a low-density system of 2-particles on a lattice with 11 sites.
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