Interaction-driven quantum Hall wedding cake–like structures in graphene quantum dots
Author(s)Gutiérrez, Christopher; Walkup, Daniel; Ghahari, Fereshte; Rodriguez-Nieva, Joaquin F.; Watanabe, Kenji; Taniguchi, Takashi; Zhitenev, Nikolai B.; Stroscio, Joseph A.; Lewandowski, Cyprian Krzysztof; Levitov, Leonid; ... Show more Show less
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Quantum-relativistic matter is ubiquitous in nature; however, it is notoriously difficult to probe. The ease with which external electric and magnetic fields can be introduced in graphene opens a door to creating a tabletop prototype of strongly confined relativistic matter. Here, through a detailed spectroscopic mapping, we directly visualize the interplay between spatial and magnetic confinement in a circular graphene resonator as atomic-like shell states condense into Landau levels. We directly observe the development of a “wedding cake”–like structure of concentric regions of compressible-incompressible quantum Hall states, a signature of electron interactions in the system. Solid-state experiments can, therefore, yield insights into the behavior of quantum-relativistic matter under extreme conditions.
American Association for the Advancement of Science (AAAS)
Gutiérrez, Christopher et al. “Interaction-Driven Quantum Hall Wedding Cake–like Structures in Graphene Quantum Dots.” Science 361, 6404 (August 2018): 789–794. doi:10.1126/science.aar2014. © 2018 The Author(s)
Author's final manuscript