Graphene with modes (IMAGE)

Helmholtz-Zentrum Berlin für Materialien und Energie

Graphene with modes

Caption

Electron microscopy shows the graphene sample (gray) in which the helium beam has created a hole pattern so that the density varies periodically. This results in the superposition of vibrational modes and the emergence of a mechanical band gap. The frequency of this phononic system can be adjusted between 50 MHz and 217 MHz by mechanical tension.

Credit

K. Höflich/HZB

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