Science Daily February 11, 2022
An international team of researchers (UK, Japan) used monolayer graphene encapsulated by hexagonal boron nitride in van der Waals heterostructure with one-dimensional contacts. They measured electron mobility up to 130,000cm2/Vs at low temperatures (20K or -253oC) and spin diffusion lengths approaching 20 μm. The nanoscale-wide 1D contacts allow spin injection both at room and at low temperature, with the latter exhibiting efficiency comparable with 2D tunnel contacts. At low temperature, the spin signals can be enhanced by as much as an order of magnitude by electrostatic gating, adding new functionality. According to the researchers the spin information is conserved over distances comparable with the best reported in the literature. These aspects open the possibility to explore logic architectures using lateral spintronic elements where long-distance spin transport is needed… read more. TECHNICAL ARTICLE
Graphical abstract. Credit: Nano Lett. 2022, 22, 3, 935–941, January 28, 2022Â