Details

Autor(en) / Beteiligte

• Campos-Delgado, Jessica
• Cançado, Luiz G.
• Achete, Carlos A.
• Jorio, Ado
• Raskin, Jean-Pierre

Titel

Raman scattering study of the phonon dispersion in twisted bilayer graphene

Ist Teil von

• Nano research, 2013-04, Vol.6 (4), p.269-274

Ort / Verlag

Heidelberg: Tsinghua Press

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Bilayer graphene with a twist angle O between the layers generates a superlattice structure known as a Moir6 pattern. This superlattice provides a O-dependent q wavevector that activates phonons in the interior of the Brillouin zone. Here we show that this superlattice-induced Raman scattering can be used to probe the phonon dispersion in twisted bilayer graphene （tBLG）. The effect reported here is different from the widely studied double-resonance in graphene-related materials in many aspects, and despite the absence of stacking order in tBLG, layer breathing vibrations （namely ZO＇ phonons） are observed.