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Strain and Piezo-Doping Mismatch between Graphene Layers

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. 11193-11199
Number 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	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

Number of the records: 1