A theoretical investigation on the carrier mobilities of armchair silicene nanoribbons

TL;DR

This paper theoretically investigates how structural factors affect carrier mobilities in armchair silicene nanoribbons, revealing oscillations with width and reductions due to edge effects, using density functional theory.

Contribution

It provides a detailed theoretical analysis of carrier mobility variations in silicene nanoribbons considering structural influences, which was not previously explored.

Findings

Carrier mobilities oscillate with nanoribbon width.

Mobility values are lower than in graphene nanoribbons.

Structural features like buckling and edge effects decrease mobility.

Abstract

Armchair silicene nanoribbons with width of 9-39 silicon atoms are investigated by using self-consistent field crystal orbital method based on density functional theory. The carrier mobilities obtained from deformation potential theory oscillate with respect to the width and the values are a fraction of what the graphene nanoribbons have. The buckled structure, hydrogen saturation, edge reconstruction as well as edge roughness decrease the carrier mobilities which are explained with the aid of crystal orbitals.