Journal
PHYSICAL REVIEW LETTERS
Volume 95, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.95.237402
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We theoretically propose that the optical analog of a Lorentz force acting on a ray of light is realized in multiferroic materials such as GaFeO3 showing the magnetoelectric effect. The toroidal moment (T) over right arrow=Sigma(j)(r) over right arrow (j) x (S) over right arrow (j) plays the role of a vector potential, while its rotation corresponds to a magnetic field for photons. Hence, the light is subject to the Lorentz force when propagating through the domain wall region of the ferromagnetic or ferroelectric order. A realistic estimate on the magnitude of this effect is given.
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