Field-induced ferromagnetism in one-dimensional tight-binding lattices
Dipartimento di Fisica, Politecnico di Milano and Istituto di Fotonica e Nanotecnologie del Consiglio Nazionale delle Ricerche - Piazza L. da Vinci 32, I-20133 Milano, Italy, EU
Received: 7 December 2012
Accepted: 4 March 2013
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 the 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.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 75.10.-b – General theory and models of magnetic ordering / 75.78.Jp – Ultrafast magnetization dynamics and switching
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