Final Report on Investigation of the Electron Interactions in Graphene
Abstract
In graphene, combined with the real spin degree of freedom, which exhibits SU(2) symmetry, the total internal degrees of freedom of graphene carriers is thus described by a larger SU(4) symmetry, which produces a richer space for potential phenomena of emergent correlated electron phenomena. The major part of this proposal is exploring this unique multicomponent correlated system in the quantum limit. In the current period of DOE BES support we have made several key advances that will serve as a foundation for the new studies in this proposal. Employing the high-mobility encapsulated graphene heterostructures developed during the current phase of research, we have investigated spin and valley quantum Hall ferromagnetism in graphene and discovered a spin phase transition leading to a quantum spin Hall analogue. We have also observed the fractal quantum Hall effect arising from the Hofstadter’s butterfly energy spectrum. In addition, we have discovered multiband transport phenomena in bilayer graphene at high carrier densities.
- Authors:
-
- Columbia University
- Publication Date:
- Research Org.:
- Columbia Univ., New York, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1170221
- Report Number(s):
- DOE-COLUMBIA-FG02-05ER46215
- DOE Contract Number:
- FG02-05ER46215
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Graphene; quantum transport; electron Interactions
Citation Formats
Kim, Philip. Final Report on Investigation of the Electron Interactions in Graphene. United States: N. p., 2015.
Web. doi:10.2172/1170221.
Kim, Philip. Final Report on Investigation of the Electron Interactions in Graphene. United States. https://doi.org/10.2172/1170221
Kim, Philip. 2015.
"Final Report on Investigation of the Electron Interactions in Graphene". United States. https://doi.org/10.2172/1170221. https://www.osti.gov/servlets/purl/1170221.
@article{osti_1170221,
title = {Final Report on Investigation of the Electron Interactions in Graphene},
author = {Kim, Philip},
abstractNote = {In graphene, combined with the real spin degree of freedom, which exhibits SU(2) symmetry, the total internal degrees of freedom of graphene carriers is thus described by a larger SU(4) symmetry, which produces a richer space for potential phenomena of emergent correlated electron phenomena. The major part of this proposal is exploring this unique multicomponent correlated system in the quantum limit. In the current period of DOE BES support we have made several key advances that will serve as a foundation for the new studies in this proposal. Employing the high-mobility encapsulated graphene heterostructures developed during the current phase of research, we have investigated spin and valley quantum Hall ferromagnetism in graphene and discovered a spin phase transition leading to a quantum spin Hall analogue. We have also observed the fractal quantum Hall effect arising from the Hofstadter’s butterfly energy spectrum. In addition, we have discovered multiband transport phenomena in bilayer graphene at high carrier densities.},
doi = {10.2172/1170221},
url = {https://www.osti.gov/biblio/1170221},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 14 00:00:00 EST 2015},
month = {Sat Feb 14 00:00:00 EST 2015}
}