期刊
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
卷 7, 期 9, 页码 643-646出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201307224
关键词
graphene; CVD; Cu; doping; band gap; Dirac cone; photoemission; nano-ARPES
资金
- EPSRC (UK), via the Doctoral Training Grant
- Warwick Centre for Analytical Sciences [EP/F034210/1]
- ULISSE project [EP/G044864/1]
- Overseas Travel Grant [EP/K005200/1]
- CALIPSO TransNational Access Program
- European Science Foundation (ESF) under the EUROCORES Program Euro-GRAPHENE
- Engineering and Physical Sciences Research Council [1102578, EP/K005200/1, EP/F034210/1, EP/G044864/1] Funding Source: researchfish
- EPSRC [EP/G044864/1, EP/F034210/1, EP/K005200/1] Funding Source: UKRI
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 degrees 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 degrees 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. (c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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