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Is graphene on copper doped?
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Marsden, Alexander J., Asensio, Maria-Carmen, Avila, José, Dudin, Pavel, Barinov, Alexei, Moras, Paolo, Sheverdyaeva, Polina M., White, T. W., Maskery, Ian, Costantini, Giovanni, Wilson, Neil R. and Bell, Gavin R. (2013) Is graphene on copper doped? physica status solidi (RRL) - Rapid Research Letters, 7 (9). pp. 643-646. doi:10.1002/pssr.201307224 ISSN 1862-6254.
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Official URL: http://dx.doi.org/10.1002/pssr.201307224
Abstract
Angle-resolved photoemission spectroscopy (ARPES) and X-ray photoemission spectroscopy have been used to characterise epitaxially ordered graphene grown on copper foil by low-pressure chemical vapour deposition. A short vacuum anneal to 200 °C allows observation of ordered low energy electron diffraction patterns. High quality Dirac cones are measured in ARPES with the Dirac point at the Fermi level (undoped graphene). Annealing above 300 °C produces n-type doping in the graphene with up to 350 meV shift in Fermi level, and opens a band gap of around 100 meV.
Dirac cone dispersion for graphene on Cu foil after vacuum anneals (left: 200 °C, undoped; right: 500 °C, n-doped). Centre: low energy electron diffraction from graphene on Cu foil after 200 °C anneal. Data from Antares (SOLEIL).
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Graphene , Copper foil, Copper, Photoemission , Dirac equation | ||||
| Journal or Publication Title: | physica status solidi (RRL) - Rapid Research Letters | ||||
| Publisher: | Wiley - V C H Verlag GmbH & Co. KGaA | ||||
| ISSN: | 1862-6254 | ||||
| Official Date: | September 2013 | ||||
| Dates: |
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| Volume: | 7 | ||||
| Number: | 9 | ||||
| Page Range: | pp. 643-646 | ||||
| DOI: | 10.1002/pssr.201307224 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Date of first compliant deposit: | 25 December 2015 | ||||
| Date of first compliant Open Access: | 25 December 2015 | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Seventh Framework Programme (European Commission) (FP7), European Science Foundation (ESF) | ||||
| Grant number: | EP/F034210/1, EP/G044864/1, EP/K005200/1 (EPSRC) |
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