Accession Number:

ADA571863

Title:

Local Electronic Properties of Graphene on a BN Substrate via Scanning Tunneling Microscopy

Descriptive Note:

Journal article

Corporate Author:

CALIFORNIA UNIV BERKELEY DEPT OF PHYSICS

Report Date:

2011-05-09

Pagination or Media Count:

6.0

Abstract:

The use of boron nitride BN as a substrate for graphene nanodevices has attracted much interest since the recent report that BN greatly improves the mobility of charge carriers in graphene compared to standard SiO2 substrates. We have explored the local microscopic properties of graphene on a BN substrate using scanning tunneling microscopy. We find that BN substrates result in extraordinarily flat graphene layers that display microscopic Moir e patterns arising from the relative orientation of the graphene and BN lattices. Gate-dependent dIdV spectra of graphene on BN exhibit spectroscopic features that are sharper than those obtained for graphene on SiO2. We observe a significant reduction in local microscopic charge inhomogeneity for graphene on BN compared to graphene on SiO2.

Subject Categories:

  • Inorganic Chemistry
  • Optics
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE