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If a magnetic field is applied perpendicularly, the behavior of the graphene sheets changes, current flows along the edges, and the remainder is an insulator. If a second strong magnetic field is applied in parallel, the behavior of graphene changes again, electrons can move along the conductive edge in either direction, electrons with a certain spin direction move clockwise, and electrons with opposite spin directions are counterclockwise. movement. MIT associate professor Jarillo-Herrero said that this is the first time to demonstrate spin-selective behavior on graphene. The researchers say the study draws new directions for the study of topological insulators.
Graphene has potential for quantum computing
The unexpected properties exhibited by graphene under extreme conditions have shown its potential for quantum computing. At extremely high magnetic fields and very low temperatures, MIT researchers have found that graphene can effectively filter electrons along the spin direction – something that traditional electronic systems cannot. Under normal conditions, graphene sheets behave like ordinary conductors: voltage is applied and current flows on a two-dimensional sheet.