Počet záznamů: 1
Evaluating arbitrary strain configurations and doping in graphene with Raman spectroscopy
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SYSNO ASEP 0483996 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Evaluating arbitrary strain configurations and doping in graphene with Raman spectroscopy Tvůrce(i) Mueller, N. S. (DE)
Heeg, S. (GB)
Peňa-Álvarez, Miriam (UFCH-W)
Kusch, P. (DE)
Wasserroth, S. (DE)
Clark, N. (GB)
Schedin, F. (GB)
Parthenios, J. (GR)
Papagelis, K. (GR)
Galiotis, C. (GR)
Kalbáč, Martin (UFCH-W) RID, ORCID
Vijayaraghavan, A. (GB)
Huebner, U. (DE)
Gorbachev, R. (GB)
Frank, Otakar (UFCH-W) RID, ORCID
Reich, S. (DE)Číslo článku 015016 Zdroj.dok. 2D Materials. - : Institute of Physics Publishing - ISSN 2053-1583
Roč. 5, č. 1 (2018)Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova graphene ; Raman ; strain ; doping ; correlation analysis ; circular polarization Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA17-18702S GA ČR - Grantová agentura ČR LL1301 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000414649800001 EID SCOPUS 85040102863 DOI 10.1088/2053-1583/aa90b3 Anotace The properties of graphene depend sensitively on strain and doping affecting its behavior in devices and allowing an advanced tailoring of this material. A knowledge of the strain configuration, i.e. the relative magnitude of the components of the strain tensor, is particularly crucial, because it governs effects like band-gap opening, pseudo-magnetic fields, and induced superconductivity. It also enters critically in the analysis of the doping level. We propose a method for evaluating unknown strain configurations and simultaneous doping in graphene using Raman spectroscopy. In our analysis we first extract the bare peak shift of the G and 2D modes by eliminating their splitting due to shear strain. The shifts from hydrostatic strain and doping are separated by a correlation analysis of the 2D and G frequencies, where we find Delta omega(2D)/Delta omega(G) = 2.21 +/- 0.05 for pure hydrostatic strain. We obtain the local hydrostatic strain, shear strain and doping without any assumption on the strain configuration prior to the analysis, as we demonstrate for two model cases: Graphene under uniaxial stress and graphene suspended on nanostructures that induce strain. Raman scattering with circular corotating polarization is ideal for analyzing frequency shifts, especially for weak strain when the peak splitting by shear strain cannot be resolved. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2019
Počet záznamů: 1