Frontiers in Nanotechnology (Feb 2024)
Quasi-freestanding AA-stacked bilayer graphene induced by calcium intercalation of the graphene-silicon carbide interface
- Antonija Grubišić-Čabo,
- Antonija Grubišić-Čabo,
- Jimmy C. Kotsakidis,
- Jimmy C. Kotsakidis,
- Yuefeng Yin,
- Yuefeng Yin,
- Anton Tadich,
- Anton Tadich,
- Anton Tadich,
- Matthew Haldon,
- Sean Solari,
- John Riley,
- Eric Huwald,
- Kevin M. Daniels,
- Kevin M. Daniels,
- Kevin M. Daniels,
- Rachael L. Myers-Ward,
- Mark T. Edmonds,
- Mark T. Edmonds,
- Nikhil V. Medhekar,
- Nikhil V. Medhekar,
- D. Kurt Gaskill,
- Michael S. Fuhrer,
- Michael S. Fuhrer
Affiliations
- Antonija Grubišić-Čabo
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- Antonija Grubišić-Čabo
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
- Jimmy C. Kotsakidis
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- Jimmy C. Kotsakidis
- Laboratory for Physical Sciences, College Park, MD, United States
- Yuefeng Yin
- Department of Materials Science and Engineering, Monash University, Clayton, VIC, Australia
- Yuefeng Yin
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), Monash University, Clayton, VIC, Australia
- Anton Tadich
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), Monash University, Clayton, VIC, Australia
- Anton Tadich
- Australian Synchrotron, Melbourne, VIC, Australia
- Anton Tadich
- Department of Physics, La Trobe University, Melbourne, VIC, Australia
- Matthew Haldon
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- Sean Solari
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- John Riley
- Department of Physics, La Trobe University, Melbourne, VIC, Australia
- Eric Huwald
- Department of Physics, La Trobe University, Melbourne, VIC, Australia
- Kevin M. Daniels
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, United States
- Kevin M. Daniels
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, United States
- Kevin M. Daniels
- 0Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, United States
- Rachael L. Myers-Ward
- 1US Naval Research Laboratory, Washington, DC, United States
- Mark T. Edmonds
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- Mark T. Edmonds
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), Monash University, Clayton, VIC, Australia
- Nikhil V. Medhekar
- Department of Materials Science and Engineering, Monash University, Clayton, VIC, Australia
- Nikhil V. Medhekar
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), Monash University, Clayton, VIC, Australia
- D. Kurt Gaskill
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD, United States
- Michael S. Fuhrer
- School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
- Michael S. Fuhrer
- ARC Centre of Excellence in Future Low Energy Electronics Technologies (FLEET), Monash University, Clayton, VIC, Australia
- DOI
- https://doi.org/10.3389/fnano.2023.1333127
- Journal volume & issue
-
Vol. 5
Abstract
We study quasi-freestanding bilayer graphene on silicon carbide intercalated by calcium. The intercalation, and subsequent changes to the system, were investigated by low-energy electron diffraction, angle-resolved photoemission spectroscopy (ARPES) and density-functional theory (DFT). Calcium is found to intercalate only at the graphene-SiC interface, completely displacing the hydrogen terminating SiC. As a consequence, the system becomes highly n-doped. Comparison to DFT calculations shows that the band dispersion, as determined by ARPES, deviates from the band structure expected for Bernal-stacked bilayer graphene. Instead, the electronic structure closely matches AA-stacked bilayer graphene on calcium-terminated SiC, indicating a spontaneous transition from AB- to AA-stacked bilayer graphene following calcium intercalation of the underlying graphene-SiC interface.
Keywords
