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Authors: Braatz, Marie-Luise
Weber, Nils-Eike
Singh, Barthi
Müllen, Klaus
Feng, Xinliang
Kläui, Mathias
Gradhand, Martin
Title: Doped graphene characterized via Raman spectroscopy and magneto-transport measurements
Online publication date: 27-Feb-2024
Year of first publication: 2023
Language: english
Abstract: Functionalizing graphene beyond its intrinsic properties has been a key concept since the first successful realization of this archetype monolayer system. While various concepts, such as doping, co-doping, and layered device design, have been proposed, the often complex structural and electronic changes are often jeopardizing simple functionalization attempts. Here, we present a thorough analysis of the structural and electronic properties of co-doped graphene via Raman spectroscopy as well as magneto-transport and Hall measurements. The results highlight the challenges in understanding its microscopic properties beyond the simple preparation of such devices. It is discussed how co-doping with N and B dopants leads to effective charge-neutral defects acting as short-range scatterers, while charged defects introduce more long-range scattering centers. Such distinct behavior may obscure or alter the desired structural as well as electronic properties not anticipated initially. Exploring further the preparation of effective pn-junctions, we highlight step by step how the preparation process may lead to alterations in the intrinsic properties of the individual layers. Importantly, it is highlighted in all steps how the inhomogeneities across individual graphene sheets may challenge simple interpretations of individual measurements.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: In Copyright
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Journal: Journal of applied physics
Pages or article number: 025304
Publisher: American Inst. of Physics
Publisher place: Melville, NY
Issue date: 2023
ISSN: 0021-8979
Publisher DOI: 10.1063/5.0117677
Appears in collections:JGU-Publikationen

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