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Insights and Implic...
Insights and Implications of Intricate Surface Charge Transfer and sp3-Defects in Graphene/Metal Oxide Interfaces
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- Belotcerkovtceva, Daria (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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- Maciel, Renan P. (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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- Berggren, Elin (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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- Maddu, Ramu (author)
- Department of Materials Science and Engineering, Uppsala University, P.O. Box 35, SE-751 03 Uppsala, Sweden
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- Sarkar, Tapati (author)
- Department of Materials Science and Engineering, Uppsala University, P.O. Box 35, SE-751 03 Uppsala, Sweden
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- Kvashnin, Yaroslav O. (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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- Thonig, Danny, 1986- (author)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden;School of Science and Technology, Örebro University, Fakultetsgatan 1, SE-70182 Örebro, Sweden
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- Lindblad, Andreas (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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- Eriksson, Olle, 1960- (author)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden;School of Science and Technology, Örebro University, Fakultetsgatan 1, SE-70182 Örebro, Sweden
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- Kamalakar, M. Venkata (author)
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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Department of Physics and Astronomy, Uppsala University, PO. Box 516, SE-751 20 Uppsala, Sweden Department of Materials Science and Engineering, Uppsala University, P.O. Box 35, SE-751 03 Uppsala, Sweden (creator_code:org_t)
- 2022-07-22
- 2022
- English.
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In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 14:31, s. 36209-36216
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- Adherence of metal oxides to graphene is of fundamental significance to graphene nanoelectronic and spintronic interfaces. Titanium oxide and aluminum oxide are two widely used tunnel barriers in such devices, which offer optimum interface resistance and distinct interface conditions that govern transport parameters and device performance. Here, we reveal a fundamental difference in how these metal oxides interface with graphene through electrical transport measurements and Raman and photoelectron spectroscopies, combined with ab initio electronic structure calculations of such interfaces. While both oxide layers cause surface charge transfer induced p-type doping in graphene, in sharp contrast to TiOx, the AlOx/graphene interface shows the presence of appreciable sp3 defects. Electronic structure calculations disclose that significant p-type doping occurs due to a combination of sp3 bonds formed between C and O atoms at the interface and possible slightly off-stoichiometric defects of the aluminum oxide layer. Furthermore, the sp3 hybridization at the AlOx/graphene interface leads to distinct magnetic moments of unsaturated bonds, which not only explicates the widely observed low spin-lifetimes in AlOx barrier graphene spintronic devices but also suggests possibilities for new hybrid resistive switching and spin valves.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Charge transfer
- graphene
- graphene electronics
- sp3-defects
- spintronics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Belotcerkovtceva ...
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Maciel, Renan P.
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Berggren, Elin
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Maddu, Ramu
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Sarkar, Tapati
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Kvashnin, Yarosl ...
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show more...
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Thonig, Danny, 1 ...
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Lindblad, Andrea ...
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Eriksson, Olle, ...
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Kamalakar, M. Ve ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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ACS Applied Mate ...
- By the university
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Örebro University
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Uppsala University