Issue 11, 2017, Issue in Progress

Nonlinear intrinsic dissipation in single layer MoS2 resonators

Abstract

Using dissipation models based on Akhiezer theory, we analyze the microscopic origin of nonlinearity in intrinsic loss of a single layer MoS2. We study the intrinsic dissipation of single layer MoS2 under axial and flexural mode of deformation using molecular dynamics (MD) simulation. We compare the amplitude scaling of intrinsic dissipation for both the cases with our proposed model. In the axial deformation case, we found a higher (4th) order dependence of dissipation on the strain amplitude. This nonlinearity is shown to stem from the strain dependence of the phonon mode Grüneisen parameter (PMGP) and is accounted for in our dissipation model. In the flexural deformation case, dissipation is found to have a stronger dependence (≥4) on the amplitude of the transverse motion. This nonlinearity can be explained by considering the coupling between out-of-plane motion and in-plane stretching. The proposed model for the flexure deformation case, which accounts for both kinds of nonlinearity, provides a good estimate of dissipation.

Graphical abstract: Nonlinear intrinsic dissipation in single layer MoS2 resonators

Article information

Article type
Paper
Submitted
14 Nov 2016
Accepted
06 Jan 2017
First published
19 Jan 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 6403-6410

Nonlinear intrinsic dissipation in single layer MoS2 resonators

S. De, K. Kunal and N. R. Aluru, RSC Adv., 2017, 7, 6403 DOI: 10.1039/C6RA26797A

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