Graphene and Spintronics



 A new study was published in the journal Nature Materials. The group comprised of staff from the Charles University of Prague and the CFM (CSIS-UPV/EHU) center in San Sebastián and a team from the CIC nanoGUNE’s Nanodevices. 

The machine being studied has designed a new complex material that will affect the field of spintronics. This material gives fresh ideas to the development of more efficient and more advanced electronic devices.

There has been a boom in research into these two dimensional materials. They create new effects when two layers of these materials are stacked to form a heterostructure. It is observed that tiny rotations of the layers can greatly change the properties of this heterostructure. 

Ikerbasque Research Professor Felix Casanova is a co-leader of the Nanodevices group at nanoGUNE. He reports, “ In this work, we studied the stacking of two layers of graphene and tungsten selenide (WSe2). If the two layers are placed one on top of the other and rotated at a precise angle, a spin current is generated in a desired specific direction.”

One of the properties of electrons and other particles is called spin. It is normally transplanted in a perpendicular direction to the electric current. One of the main limitations of spintronics is handling the spin currents 

Casanova summarizes, “ This work shows that this limitation in fact disappears when suitable materials are used. By simply stacking two layers and applying a ‘magic’ twist new spin-related properties that do not exist in the initial materials can be observed.  The more flexibility we have in the choice of materials, the greater the design possibilities are for next generation devices.”

The study reveals unprecedented spin properties in a new artificial material! 

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