Nanowerk November 25, 2024 Pristine graphene is potentially an ideal medium for transporting spin information. Proximity effects can also be used in graphene to generate and detect spins by acquiring spin–orbit coupling or magnetic exchange coupling. However, the development of seamless spintronic devices that are based only on proximity effects remains challenging. An international team of researchers (Spain, Belgium, France) found that a two-dimensional graphene spin valve that was enabled by proximity to the van der Waals magnet Cr2Ge2Te6. Spin precession measurements showed that graphene acquires both spin–orbit coupling and magnetic exchange coupling when interfaced with the Cr2Ge2Te6 leading to […]
Tag Archives: Hall effect
New technique lets scientists create resistance-free electron channels
Science Daily April 9. 2024 Moiré systems made from stacked two-dimensional materials host correlated and topological states that can be electrically controlled with applied gate voltages. One prevalent form of topological state that can occur are Chern insulators that display a quantum anomalous Hall effect. An international team of researchers (USA – UC Berkeley, Lawrence Berkeley National Laboratory, Japan) manipulated Chern domains in an interaction-driven quantum anomalous Hall insulator made from twisted monolayer–bilayer graphene and observed chiral interface states at the boundary between different domains. By tuning the carrier concentration, they stabilized neighbouring domains of opposite Chern number that then […]