Shubnikov-de Haas measurements on a high mobility monolayer graphene flake sandwiched between boron nitride sheets.
J Phys Condens Matter
; 29(22): 225301, 2017 Jun 07.
Article
in En
| MEDLINE
| ID: mdl-28406425
ABSTRACT
A flake of monolayer graphene was sandwiched between boron nitride sheets. Temperature dependent Shubnikov-de Haas measurements were performed to access how this technique influences the electronic properties of the graphene sample. The maximum mobility found in this configuration was approximately 105 cm2 Vs -1. From the phase of the oscillations a Berry phase ß of 1/2 was obtained indicating the presence of Dirac fermions. We obtained Fermi velocities around [Formula see text] m s-1 which imply hopping energies close to 2.5 eV. Furthermore, the carrier lifetime is typically higher than that found in graphene supported by SiO2, reaching values higher than 700 fs.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Phys Condens Matter
Journal subject:
BIOFISICA
Year:
2017
Document type:
Article
Affiliation country:
Japan