Orbital antiferroelectricity and higher dimensional magnetoelectric order in the spin-1/2 XX chain extended with three-spin interactions

We study the spin-1/2 XX model extended with three-spin interactions of the XZX+YZY and X Z Y - Y Z X types. We solve the model exactly and obtain the ground state phase diagram as a function of the two three-spin coupling strengths. We show that even in absence of external electric and magnetic fie...

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