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Magnesium-intercala...
Magnesium-intercalated graphene on SiC : Highly n-doped air-stable bilayer graphene at extreme displacement fields
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- Grubisic-Cabo, Antonija (författare)
- KTH,Tillämpad fysik,Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.
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- Kotsakidis, Jimmy C. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.
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- Yin, Yuefeng (författare)
- Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia.;Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.
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- Tadich, Anton (författare)
- Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.;Australian Synchrotron, Clayton, Vic 3168, Australia.;La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia.
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- Haldon, Matthew (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.
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- Solari, Sean (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.
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- Di Bernardo, Iolanda (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.
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- Daniels, Kevin M. (författare)
- Univ Maryland, Dept ECE, College Pk, MD 20742 USA.
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- Riley, John (författare)
- La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia.
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- Huwald, Eric (författare)
- La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia.
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- Edmonds, Mark T. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.
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- Myers-Ward, Rachael (författare)
- US Naval Res Lab, Washington, DC 20375 USA.
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- Medhekar, Nikhil V. (författare)
- Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia.;Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.
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- Gaskill, D. Kurt (författare)
- Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA.
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- Fuhrer, Michael S. (författare)
- Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;Monash Univ, Ctr Future Low Energy Elect Technol, Clayton, Vic 3800, Australia.
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(creator_code:org_t)
- Elsevier BV, 2021
- 2021
- Engelska.
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Ingår i: Applied Surface Science. - : Elsevier BV. - 0169-4332 .- 1873-5584. ; 541
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We use angle-resolved photoemission spectroscopy to investigate the electronic structure of bilayer graphene at high n-doping and extreme displacement fields, created by intercalating epitaxial monolayer graphene on silicon carbide with magnesium to form quasi-freestanding bilayer graphene on magnesium-terminated silicon carbide. Angle-resolved photoemission spectroscopy reveals that upon magnesium intercalation, the single massless Dirac band of epitaxial monolayer graphene is transformed into the characteristic massive double-band Dirac spectrum of quasi-freestanding bilayer graphene. Analysis of the spectrum using a simple tight binding model indicates that magnesium intercalation results in an n-type doping of 2.1 x 10(14) cm(-2) and creates an extremely high displacement field of 2.6 V/nm, thus opening a considerable gap of 0.36 eV at the Dirac point. This is further confirmed by density-functional theory calculations for quasi-freestanding bilayer graphene on magnesium-terminated silicon carbide, which show a similar doping level, displacement field and bandgap. Finally, magnesium-intercalated samples are surprisingly robust to ambient conditions; no significant changes in the electronic structure are observed after 30 min exposure to air.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Graphene
- Extremely high displacement field
- Electronic structure
- ARPES
- Air exposure
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Grubisic-Cabo, A ...
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Kotsakidis, Jimm ...
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Yin, Yuefeng
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Tadich, Anton
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Haldon, Matthew
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Solari, Sean
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visa fler...
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Di Bernardo, Iol ...
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Daniels, Kevin M ...
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Riley, John
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Huwald, Eric
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Edmonds, Mark T.
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Myers-Ward, Rach ...
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Medhekar, Nikhil ...
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Gaskill, D. Kurt
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Fuhrer, Michael ...
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