Issue 44, 2021

Asymmetric carrier transport and weak localization in few layer graphene grown directly on a dielectric substrate

Abstract

Temperature-dependent electrical and magneto-transport measurements have been performed on devices composed of few layer (4L) graphene grown directly on SiO2/Si substrates using the CVD method. An intrinsic energy band-gap of 4.6 meV in 4L graphene is observed, which primarily dictates the current transport at T <50 K. Unusual temperature dependent electron–hole conduction asymmetry is observed at T >50 K, which can be explained in the framework of the defect scattering of relativistic charge carriers. Magneto-transport measurements reveal a weak localization effect sustainable till T >200 K. The coexistence of phonon mediated carrier mobility and defect induced weak localization effects in measuring devices suggests low disorder and impurity scattering.

Graphical abstract: Asymmetric carrier transport and weak localization in few layer graphene grown directly on a dielectric substrate

Supplementary files

Article information

Article type
Paper
Submitted
15 Jul 2021
Accepted
29 Sep 2021
First published
06 Oct 2021

Phys. Chem. Chem. Phys., 2021,23, 25284-25290

Asymmetric carrier transport and weak localization in few layer graphene grown directly on a dielectric substrate

M. S. Abbas, P. K. Srivastava, Y. Hassan and C. Lee, Phys. Chem. Chem. Phys., 2021, 23, 25284 DOI: 10.1039/D1CP03225A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements