Details

Autor(en) / Beteiligte

• Settnes, Mikkel
• Power, Stephen R
• Petersen, Dirch H
• Jauho, Antti-Pekka

Titel

Theoretical analysis of a dual-probe scanning tunneling microscope setup on graphene

Ist Teil von

• Physical review letters, 2014-03, Vol.112 (9), p.096801-096801, Article 096801

Ort / Verlag

United States

Erscheinungsjahr

2014

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• Experimental advances allow for the inclusion of multiple probes to measure the transport properties of a sample surface. We develop a theory of dual-probe scanning tunneling microscopy using a Green's function formalism, and apply it to graphene. Sampling the local conduction properties at finite length scales yields real space conductance maps which show anisotropy for pristine graphene systems and quantum interference effects in the presence of isolated impurities. Spectral signatures in the Fourier transforms of real space conductance maps include characteristics that can be related to different scattering processes. We compute the conductance maps of graphene systems with different edge geometries or height fluctuations to determine the effects of nonideal graphene samples on dual-probe measurements.