Details

Autor(en) / Beteiligte

• Samaddar, S
• Yudhistira, I
• Adam, S
• Courtois, H
• Winkelmann, C B

Titel

Charge Puddles in Graphene near the Dirac Point

Ist Teil von

• Physical review letters, 2016-03, Vol.116 (12), p.126804-126804, Article 126804

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2016

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The charge carrier density in graphene on a dielectric substrate such as SiO_{2} displays inhomogeneities, the so-called charge puddles. Because of the linear dispersion relation in monolayer graphene, the puddles are predicted to grow near charge neutrality, a markedly distinct property from conventional two-dimensional electron gases. By performing scanning tunneling microscopy and spectroscopy on a mesoscopic graphene device, we directly observe the puddles' growth, both in spatial extent and in amplitude, as the Fermi level approaches the Dirac point. Self-consistent screening theory provides a unified description of both the macroscopic transport properties and the microscopically observed charge disorder.