Theoretically predicted picosecond optical switching of spin chirality in multiferroics

Details Theoretically predicted picosecond optical switching of spin chirality in multiferroics Theoretically predicted picosecond optical switching of spin chirality in multiferroics

2010-10-28

arxiv.org/abs/1010.6006v1

Phys. Rev. Lett. 105, 147202 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4+ pages, 5 figures

Scientific paper

10.1103/PhysRevLett.105.147202

We show theoretically with an accurate spin Hamiltonian describing the multiferroic Mn perovskites that the application of the picosecond optical pulse with a terahertz frequency can switch the spin chirality through intensely exciting the electromagnons. There are four states with different spin chiralities, i.e. clockwise and counterclockwise ab/bc-plane spin spirals, and by tuning the strength, shape and length of the pulse, the switching among these states can be controlled at will. Dynamical pattern formation during the switching is also discussed.

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