Summary: LETTERS
Observation of Landau levels of Dirac
fermions in graphite
GUOHONG LI AND EVA Y. ANDREI*
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
*e-mail: eandrei@physics.rutgers.edu
Published online: 8 July 2007; doi:10.1038/nphys653
The unique electronic behaviour of monolayer and bilayer
graphene1,2
is a result of the unusual quantum-relativistic
characteristics of the so-called `Dirac fermions' (DFs) that carry
charge in these materials. Although DFs in monolayer graphene
move as if they were massless, and in bilayer graphene they
do so with non-zero mass, all DFs show chirality, which gives
rise to an unusual Landau level (LL) energy spectrum3­11
and
the observation of an anomalous quantum Hall effect in both
types of graphene4,5,8
. Here we report low-temperature scanning
tunnelling spectra of graphite subjected to a magnetic field of up

Source: Andrei, Eva Y. - Department of Physics and Astronomy, Rutgers University

Collections: Materials Science; Physics