IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Quantum Hall effect in graphene: a functional determinant approach
Autor/es:
C.G. BENEVENTANO; E.M. SANTANGELO
Revista:
JOURNAL OF PHYSICS. A - MATHEMATICAL AND GENERAL
Editorial:
IOP Publishing
Referencias:
Lugar: London; Año: 2008 vol. 41 p. 164035 - 164036
ISSN:
0305-4470
Resumen:
We start the paper with a brief presentation of the main characteristics of
graphene, and of the Dirac theory of massless fermions in 2+1 dimensions
obtained as the associated low-momentum effective theory, in the absence
of external fields. We then summarize the main steps needed to obtain the
Hall conductivity in the effective theory at finite temperature and density, with
emphasis on its dependence on the phase of the Dirac determinant selected
during the evaluation of the effective action. Finally, we discuss the behavior,
under gauge transformations, of the contribution due to the lowest Landau level,
and interpret gauge transformations as rotations of the corresponding spinors
around the magnetic field.