Field-induced ferromagnetism in one-dimensional tight-binding lattices

TL;DR

This paper demonstrates theoretically that high-frequency electric fields can induce and control ferromagnetic order in one-dimensional Hubbard models with strong interactions, enabling magnetic phase manipulation in non-magnetic systems.

Contribution

It introduces a method to induce and control ferromagnetism in 1D non-magnetic systems using high-frequency electric fields within the t1-t2 Hubbard model framework.

Findings

High-frequency electric fields can induce ferromagnetism in 1D Hubbard systems.

Numerical simulations confirm phase transition control in low-density two-particle systems.

Artificial ferromagnetism can be achieved without intrinsic magnetic ordering.

Abstract

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.