Heat transport between antiferromagnetic insulators and normal metals

Abstract

Antiferromagnetic insulators can become active spintronics components by controlling and detecting their dynamics via spin currents in adjacent metals. This cross-talk occurs via spin-transfer and spin-pumping, phenomena that have been predicted to be as strong in antiferromagnets as in ferromagnets. Here, we demonstrate that a temperature gradient drives a significant heat flow from magnons in antiferromagnetic insulators to electrons in adjacent normal metals. The same coefficients as in the spin-transfer and spin-pumping processes also determine the thermal conductance. However, in contrast to ferromagnets, the heat is not transferred via a spin Seebeck effect which is absent in antiferromagnetic insulator-normal metal systems. Instead, the heat is transferred via a large staggered spin Seebeck effect.

4+ pages, 1 figure

References in corpus (11)

• Spin Seebeck insulator
• Room-temperature antiferromagnetic memory resistor
• Theory of magnon-driven spin Seebeck effect
• Spin pumping and spin-transfer torques in antiferromagnets
• Phenomenology of Current-Induced Dynamics in Antiferromagnets
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Measurements of the exchange stiffness of YIG films by microwave resonance techniques
• Spin transfer in an antiferromagnet
• Spin Seebeck effect in antiferromagnets and compensated ferrimagnets
• Spin-transfer torques in anti-ferromagnetic metals from first principles
• Effect of Polarized Current on the Magnetic State of Antiferromagnet

Cited by in corpus (10)

• Antiferromagnetic spintronics
• Antiferromagnetic spin Seebeck Effect
• Thermoelectric generation based on spin Seebeck effects
• Spin Insulatronics
• Bulk and edge spin transport in topological magnon insulators
• Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators
• Electrically Driven Bose-Einstein Condensation of Magnons in Antiferromagnets
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Magnetic-Field-Driven Antiferromagnetic Domain Wall Motion
• Part of a collection of reviews on antiferromagnetic spintronics. Antiferromagnetic dynamics, spin-texures, and nanostructures