Elastodynamically induced spin current in a coupled spin-lattice system

Yonghong Yan () and Hui Zhao ()
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Yonghong Yan: Shaoxing University
Hui Zhao: Tongji University

The European Physical Journal B: Condensed Matter and Complex Systems, 2023, vol. 96, issue 8, 1-6

Abstract: Abstract We investigate theoretically the lattice motion-induced DC spin current in a coupled spin-lattice system. The XY spin-Peierls model is adopted to mimic the spin lattice interaction, and then via the Jordan–Wigner transformation the $$S=\frac{1}{2}$$ S = 1 2 spin system is mapped to a fermion one. By using the quadratic response theory, we demonstrate that a DC spin current can be generated by the lattice wave. The dependence of the spin current on the external magnetic field and the properties of the lattice wave has been addressed. Moreover, it is found that the spin current is linearly proportional to the relaxation time, similar to the injection current in electronic systems. The results suggest the potential of lattice dynamics to produce spin currents in magnetic systems.

Date: 2023
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DOI: 10.1140/epjb/s10051-023-00581-4

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