The International Institute of Physics in Brazil recently uploaded this interesting talk by Stephan Roche from the ICREA and CINN who discusses valleytronics in 2D materials (such as graphene):
This talk was given as part of the IIP's 2D Materials: From Fundamentals to Spintronics workshop which took place in early October.
The US National Science Foundation (NSF) has allocated $20-25 million for a new six year program called "Enabling Quantum Leap: Convergent Accelerated Discovery Foundries for Quantum Materials Science, Engineering, and Information" (Q-AMASE-i).
Q-AMASE-i encompasses many clases of materials, includings ones that explore the paradigms or spintronics, hybrid 2D materials - and Valleytronics.
Researchers from the RAS in Russia and RIKEN in Japan have proved the existence of a new class of materials, spin-valley half-metals. This discovery could lead to devices that enable both valleytronics and spintronics.
In "regular" half-metals, all the electrons that participate in electric currents have the same spin - and so the current is always spin-polarized. These materials have interesting applications for spintronics devices. In the new class of materials now proven theoretically to be possible, there are two valleys present - one providing electrons, one providing holes.