Interaction-driven quantum Hall wedding cake–like structures in graphene quantum dots
Abstract
In nanostructures such as quantum dots, spatial confinement forces electrons to assume discrete energy levels. Quantization can also occur in an external magnetic field, where electrons' energies group into so-called Landau levels (LLs). Gutiérrez et al. explored the interplay between these two mechanisms and electronic interactions in a circulator resonator made of graphene. As an external magnetic field was increased, the electron quantum states transformed from atomic-like states to LL-like states. Electronic interactions caused a characteristic wedding cake–like shape of electronic density at high fields.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 24, 2018
- Source ID
- 10.1126/science.aar2014
Entities
People
- Christopher Gutiérrez
- Cyprian Lewandowski
- Daniel Walkup
- Fereshte Ghahari
- Joaquin F Rodriguez-Nieva
- Joseph A. Stroscio
- Kenji Watanabe
- Leonid Levitov
- Nikolai Zhitenev
- Takashi Taniguchi
Organizations
- Harvard University
- Massachusetts Institute of Technology
- National Institute for Materials Science
- National Institute of Standards and Technology
- National Science Foundation
- United States Army Research Laboratory
- University of Maryland