Carbon systems

Electron and hole mobility in carbon hybrid structures

O. E. Glukhova^ab, M. M. Slepchenkov^a, A. A. Petrunin<sup>a

a</sup> Saratov State University, 410012 Saratov, Russia
^b I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia

Abstract: Within the framework of density functional theory, we conducted a study of the influence of topological features on the mobility of electrons and holes in hybrid graphene-nanotube structures, where the vertically oriented graphene nanoribbon is covalently attached to the lateral surface of the single-walled carbon nanotubes. Topological features are understood as the diameter of the nanotube and the width of the nanoribbon. It has been established that increasing the diameter of the nanotube from 6.26 to 12.52 $\mathring{\mathrm{A}}$ leads to an increase in electron mobility in hybrid structures by more than 50 times. With an increase in the width of the nanoribbon from 9.81 to 22.17 $\mathring{\mathrm{A}}$ and a fixed diameter of the nanotube (12.52 $\mathring{\mathrm{A}}$), the electron mobility also increases, but only by $\sim$1.5 times.

Keywords: charge carrier mobility, effective mass, deformation potential, graphene-nanotube structures.

Received: 10.07.2024
Revised: 21.10.2024
Accepted: 23.12.2024

DOI: 10.61011/FTP.2024.12.59829.6872

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