By observing spin structure in “magic-angle” graphene, a team of scientists led by Brown University researchers has found a workaround for a long-standing roadblock in the field of two-dimensional electronics. Physicists have struggled for two decades to directly manipulate electron spin in 2D ma
Researchers have discovered a new experimental technique to study electron spin properties in 2D quantum materials, overcoming a longstanding challenge and potentially enabling the development of advanced computational and communicational technologies based on these materials. Credit: Jia Li/Brown University, a team of scientists led by Brown University researchers has found a workaround for a long-standing roadblock in the field of two-dimensional electronics.
Standing in the way is that the typical way in which scientists measure the spin of electrons — an essential behavior that gives everything in the physical universe its structure — usually doesn’t work in 2D materials. This makes it incredibly difficult to fully understand the materials and propel forward technological advances based on them. But a team of scientists led by Brown University researchers believes they now have a way around this longstanding challenge.
“A lot of the major questions that were posed in 2018 have still yet to be answered,” said Erin Morissette, a graduate student in Li’s lab at Brown who led the work. The researchers were able to observe novel information from the experiments. The team noticed, for instance, that interactions between the photons and electrons made electrons in certain sections of the system behave as they would in an anti-ferromagnetic system — meaning the magnetism of some atoms was canceled out by a set of magnetic atoms that are aligned in a reverse direction.
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