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November 25, 2020

Monolayer WSe2 hosting 'composite fermions'

A monolayer semiconductor has been found to be close to ideal as a platform for fractional quantum Hall state -- a quantum liquid that emerges under large perpendicular magnetic fields. This image illustrates monolayer WSe2 hosting "composite fermions," quasi-particles that form due to the strong interactions between electrons, and are responsible for the sequence of fractional quantum Hall states -- one of the most delicate phases of matter.

[This research was supported by the U.S. National Science Foundation (grants DMR 1420634 and DMR 1157490.]

Learn more in the Columbia Engineering news story 2D semiconductors found to be close-to-ideal fractional quantum hall platform. (Date image taken: 2020; date originally posted to NSF Multimedia Gallery: Nov. 25, 2020)

Credit: Cory R. Dean, Columbia University


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