Theory of spin transport through antiferromagnetic insulator

Abstract

A theoretical formulation for spin transport through an antiferromagnetic (AF) insulator is presented in the case driven/detected by direct/inverse spin Hall effect in two heavy metal contacts. The spin signal is shown to be transferred by the ferromagnetic correlation function of the antiferromagnet, which is calculated based on a magnon representation. To cover high temperature regimes, we include an auxiliary field representing short AF correlations and a temperature-dependent damping due to magnon scattering. The diffusion length for spin is long close to the degeneracy of the two AF magnons, and has a maximum as function of temperature near the Néel transition.

References in corpus (1)

• Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc

Cited by in corpus (9)

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• Nonlocality of electrically-induced spin accumulation in chiral metals
• Ginzburg-Landau theory of spin pumping through an antiferromagnetic layer near the Néel temperature