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Strain and Piezo-Doping Mismatch between Graphene Layers
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SYSNO ASEP 0534508 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Strain and Piezo-Doping Mismatch between Graphene Layers Author(s) Forestier, A. (FR)
Balima, F. (FR)
Bousige, C. (FR)
Pinheiro, G. S. (BR)
Fulcrand, R. (FR)
Kalbáč, Martin (UFCH-W) RID, ORCID
Machon, D. (FR)
San-Miguel, A. (FR)Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 124, č. 20 (2020), s. 11193-11199Number of pages 7 s. Language eng - English Country US - United States Keywords raman-spectroscopy ; bilayer graphene ; high-pressure ; compression ; scattering ; electron ; argon Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects LTC18039 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001821 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000537428000044 EID SCOPUS 85084566011 DOI https://doi.org/10.1021/acs.jpcc.0c01898 Annotation Modulation of electronic properties of bilayer materials through the strain and doping mismatch between layers opens new opportunities in 2D material straintronics. We present here a new approach allowing to generate asymmetric strain or doping between layers and a method to quantify it using a supported isotopically labeled bilayer graphene studied by in situ Raman spectroscopy. Strain differences up to similar to 0.1% between the two graphene layers have been obtained by applying pressures of up to 10 GPa with nonpolar solid environments. However, when immersed in a liquid polar environment, namely, a mixture of ethanol and methanol, a piezo-doping mismatch between layers is observed. This asymmetrical doping increases with pressure, leading to charge concentration differences between layers of the order of 10(13) cm(-2). Our approach thus allows disentangling strain and doping effects in high-pressure experiments evidencing the asymmetries of these phenomena and comforting isotopic bilayer graphene as a benchmark system for the study of asymmetric effects in devices or composite surfaces. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0312694
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