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Quantum controlling and the topological properties of the magnon photo-transport in two-dimensional collinear ferromagnet
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In our work, we study magnon transport induced by light through Aharonov-Casher (AC) effect, including magnon spin photocurrent (MSPC) and magnon energy photocurrent (MEPC). Firstly, we regard the effect of the electric field on the magnon through the AC effect as a perturbation. Then we derived the expressions of MSPC and MEPC in two-dimensional collinear ferromagnetic system. And we apply our theory to the two-dimension ferromagnetic Hexagonal and Kagome lattice. We find that the optical frequency and the relaxation time of the material can be used to control the photo-transport of magnons. In addition, under the condition of low light frequncy and infinite relaxation time, the longitudinal magnon photo-transport is related to the topological property of the magnon system.
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Cited by 1 Pith paper
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Ferroelectricity in a magnon Bose-Einstein condensate: Nonreciprocal superfluidity, exceptional points, and Majorana bosons
Strong Aharonov-Casher coupling drives a magnon Bose-Einstein condensate into a spontaneous ferroelectric superfluid, with nonreciprocal excitations and an exceptional flat band at the critical point.
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