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Probing the uniform...
Probing the uniformity of hydrogen intercalation in quasi-free-standing epitaxial graphene on SiC by micro-Raman mapping and conductive atomic force microscopy
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- Giannazzo, F. (författare)
- CNR, Italy
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- Shtepliuk, Ivan (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Ivanov, Ivan Gueorguiev (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Iakimov, Tihomir (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Kakanakova-Gueorguieva, Anelia (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Schiliro, E. (författare)
- CNR, Italy
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- Fiorenza, P. (författare)
- CNR, Italy
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- Yakimova, Rositsa (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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(creator_code:org_t)
- 2019-04-24
- 2019
- Engelska.
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Ingår i: Nanotechnology. - : IOP PUBLISHING LTD. - 0957-4484 .- 1361-6528. ; 30:28
- Relaterad länk:
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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
- In this paper, micro-Raman mapping and conductive atomic force microscopy (C-AFM) were jointly applied to investigate the structural and electrical homogeneity of quasi-free-standing monolayer graphene (QFMLG), obtained by high temperature decomposition of 4H-SiC(0001) followed by hydrogen intercalation at 900 degrees C. Strain and doping maps, obtained by Raman data, showed the presence of sub-micron patches with reduced hole density correlated to regions with higher compressive strain, probably associated with a locally reduced hydrogen intercalation. Nanoscale resolution electrical maps by C-AFM also revealed the presence of patches with enhanced current injection through the QFMLG/SiC interface, indicating a locally reduced Schottky barrier height (Phi(B)). The Phi(B) values evaluated from local I-V curves by the thermionic emission model were in good agreement with the values calculated for the QFMLG/SiC interface using the Schottky-Mott rule and the graphene holes density from Raman maps. The demonstrated approach revealed a useful and non-invasive method to probe the structural and electrical homogeneity of QFMLG for future nano-electronics applications.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- epitaxial graphene; silicon carbide; hydrogen intercalation; Raman spectroscopy; conductive atomic force microscopy; Schottky barrier
Publikations- och innehållstyp
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- art (ämneskategori)
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