Details

Autor(en) / Beteiligte

• Klimov, Nikolai N.
• Jung, Suyong
• Zhu, Shuze
• Li, Teng
• Wright, C. Alan
• Solares, Santiago D.
• Newell, David B.
• Zhitenev, Nikolai B.
• Stroscio, Joseph A.

Titel

Electromechanical Properties of Graphene Drumheads

Ist Teil von

• Science (American Association for the Advancement of Science), 2012-06, Vol.336 (6088), p.1557-1561

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2012

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• We determined the electromechanical properties of a suspended graphene layer by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements, as well as computational simulations of the graphene-membrane mechanics and morphology. A graphene membrane was continuously deformed by controlling the competing interactions with a STM probe tip and the electric field from a back-gate electrode. The probe tip-induced deformation created a localized strain field in the graphene lattice. STS measurements on the deformed suspended graphene display an electronic spectrum completely different from that of graphene supported by a substrate. The spectrum indicates the formation of a spatially confined quantum dot, in agreement with recent predictions of confinement by strain-induced pseudomagnetic fields.