Event Date and Time
Kin Fai Mak, Cornell University
Controlling magnetism by electrical means is a key challenge to more energy efficient information technology. The concept has been explored in a variety of materials including dilute magnetic semiconductors, ferromagnetic metal thin films and multiferroics. The recently emerged atomically thin magnetic materials provide unprecedented opportunities to study magnetism in the 2D limit and engineer devices through van der Waals heterostructures. In this talk, I will first present our recent results on switching the interlayer magnetic order in a 2D antiferromagnet by either a pure electric field or electrostatic doping and discuss possible mechanisms for the observed effects. I will also discuss a new method of electrical switching a 2D ferromagnet by monitoring and controlling critical spin fluctuations by a Maxwell’s demon, who uses information as a resource to perform the switching. The technique allows magnetic switching at an energy scale of kT (k: Boltzmann constant. T: temperature.), and is millions of times more energy efficient than current technologies.