Journal
SCIENCE
Volume 361, Issue 6404, Pages 789-793Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aar2014
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Funding
- University of Maryland [70NANB10H193]
- National Institute of Standards and Technology Center for Nanoscale Science and Technology, through the University of Maryland [70NANB10H193]
- STC Center for Integrated Quantum Materials (CIQM) under NSF award [1231319]
- U.S. Army Research Laboratory
- U.S. Army Research Office through the Institute for Soldier Nanotechnologies [W911NF-13-D-0001]
- Harvard-MIT Center for Ultracold Atoms, NSF [DMR-1308435]
- CREST, JST [JPMJCR15F3]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1231319] Funding Source: National Science Foundation
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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.
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