Diffraction and near-zero transmission of flexural phonons at graphene grain boundaries
Journal article, 2015

Graphene grain boundaries are known to affect phonon transport and thermal conductivity, suggesting that they may be used to engineer the phononic properties of graphene. Here, the effect of two buckled grain boundaries on long-wavelength flexural acoustic phonons has been investigated as a function of angle of incidence using molecular dynamics. The flexural acoustic mode has been chosen due to its importance to thermal transport. It is found that the transmission through the boundaries is strongly suppressed for incidence angles close to 35 degrees. Also, the grain boundaries are found to act as diffraction gratings for the phonons.

Author

Edit Ahlberg Helgee

Chalmers, Applied Physics, Condensed Matter Theory

Andreas Isacsson

Chalmers, Applied Physics, Condensed Matter Theory

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 91 20

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Subject Categories

Physical Sciences

DOI

10.1103/PhysRevB.91.205432

More information

Created

10/8/2017