Thursday, January 17, 2013

1301.3802 (L. Chotorlishvili et al.)

Solitons in a composite multiferroic chain    [PDF]

L. Chotorlishvili, R. Khomeriki, A. Sukhov, S. Ruffo, J. Berakdar
In a coupled ferroelectric/ferromagnetic system, i.e. a composite multiferroic, the propagation of magnetic or ferroelectric excitations across the whole structure is a key issue for applications. Of a special interest is the magnetic or ferroelectric soliton dynamics across the ferroelectric-ferromagnetic interface, particularly when the soliton carrier frequency is in the band of the ferroelectric and in the band gap of the ferromagnet. For a proper choice of system parameters, we find that there is a threshold amplitude above which the interface becomes transparent and a band gap ferroelectric soliton penetrates the ferromagnetic array. Below that threshold the soliton is fully reflected. Slightly below the transmission threshold, the addition of noise may lead to soliton transmission, provided that the noise level is not too low or too high, as found in stochastic resonance. These findings represent an important step towards the application of ferroelectric and/or ferromagnetic soliton-based logic.
View original: http://arxiv.org/abs/1301.3802

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