Potential solution to overheating mobile phones

The original title is "Magnetization switching by magnon-mediated spin torque through an antiferromagnetic insulator"

From the Guidelines: https://news.ycombinator.com/newsguidelines.html

> Otherwise please use the original title, unless it is misleading or linkbait; don't editorialize.

I clicked this and expected to read about new kinds of thermal paste or whatever, not to be slapped in the face with a whole field of solid state physics I'd never even heard of before (magnonics). I'd complain about being paywalled by the website but I'd probably not understand anything beyond the abstract (and even then, hardly). Can someone offer a dumbed-down explanation of this to someone who only barely understands Maxwell's equations?