Shift current from electromagnon excitations in multiferroics
arXiv:1910.05182 · doi:10.1103/PhysRevB.100.235138
Abstract
Electromagnon is the spin wave in multiferroic materials and is known to accompany electric polarization due to the cross correlation between the charge and spin. Here, we theoretically show that the electromagnons also induce dc current upon their photoexcitations. The proposed dc current response originates from the shift current mechanism which is characterized by the so called shift vector, a geometric quantity of the Bloch wavefunctions.
8 pages, 4 figures
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- Bulk photovoltaic effect in antiferromagnet: Role of collective spin dynamics
- Photocurrent of exciton polaritons
- A Comprehensible Review: Magnonic Magnetoelectric Coupling in Ferroelectric/ Ferromagnetic Composites
- Nonlinear Hall effect driven by spin-charge-coupled motive force
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- Geometric Effects on Tunneling in Driven Quantum Systems