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Huwald Eric - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-intercalated graphene on SiC: highly n-doped air-stable bilayer graphene at Extreme Displacement fields
2020Co-Authors: Grubišić-Čabo Antonija, Kotsakidis, Jimmy C., Yin Yuefeng, Tadich Anton, Haldon Matthew, Solari Sean, Di Bernardo Iolanda, Daniels, Kevin M., Riley John, Huwald EricAbstract: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 $\times$ 10$^{14}$ cm$^{-2}$, creates an Extremely high Displacement field of 2.6 V/nm, 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 minutes exposure in air.Comment: 46 pages including supporting information, 4 figures in the main paper and 9 figures in the supporting informatio
Grubišić-Čabo Antonija - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-intercalated graphene on SiC: highly n-doped air-stable bilayer graphene at Extreme Displacement fields
2020Co-Authors: Grubišić-Čabo Antonija, Kotsakidis, Jimmy C., Yin Yuefeng, Tadich Anton, Haldon Matthew, Solari Sean, Di Bernardo Iolanda, Daniels, Kevin M., Riley John, Huwald EricAbstract: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 $\times$ 10$^{14}$ cm$^{-2}$, creates an Extremely high Displacement field of 2.6 V/nm, 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 minutes exposure in air.Comment: 46 pages including supporting information, 4 figures in the main paper and 9 figures in the supporting informatio
Kotsakidis, Jimmy C. - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-intercalated graphene on SiC: highly n-doped air-stable bilayer graphene at Extreme Displacement fields
2020Co-Authors: Grubišić-Čabo Antonija, Kotsakidis, Jimmy C., Yin Yuefeng, Tadich Anton, Haldon Matthew, Solari Sean, Di Bernardo Iolanda, Daniels, Kevin M., Riley John, Huwald EricAbstract: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 $\times$ 10$^{14}$ cm$^{-2}$, creates an Extremely high Displacement field of 2.6 V/nm, 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 minutes exposure in air.Comment: 46 pages including supporting information, 4 figures in the main paper and 9 figures in the supporting informatio
Riley John - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-intercalated graphene on SiC: highly n-doped air-stable bilayer graphene at Extreme Displacement fields
2020Co-Authors: Grubišić-Čabo Antonija, Kotsakidis, Jimmy C., Yin Yuefeng, Tadich Anton, Haldon Matthew, Solari Sean, Di Bernardo Iolanda, Daniels, Kevin M., Riley John, Huwald EricAbstract: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 $\times$ 10$^{14}$ cm$^{-2}$, creates an Extremely high Displacement field of 2.6 V/nm, 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 minutes exposure in air.Comment: 46 pages including supporting information, 4 figures in the main paper and 9 figures in the supporting informatio
Daniels, Kevin M. - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-intercalated graphene on SiC: highly n-doped air-stable bilayer graphene at Extreme Displacement fields
2020Co-Authors: Grubišić-Čabo Antonija, Kotsakidis, Jimmy C., Yin Yuefeng, Tadich Anton, Haldon Matthew, Solari Sean, Di Bernardo Iolanda, Daniels, Kevin M., Riley John, Huwald EricAbstract: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 $\times$ 10$^{14}$ cm$^{-2}$, creates an Extremely high Displacement field of 2.6 V/nm, 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 minutes exposure in air.Comment: 46 pages including supporting information, 4 figures in the main paper and 9 figures in the supporting informatio
