Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-05-14
Phys. Rev. B 76, 115435 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, 6 figures
Scientific paper
We have studied the interplay of an Anderson impurity in Landau quantized graphene, with special emphasis on the influence of the chemical potential. Within the slave-boson mean-field theory, we found reentrant Kondo behaviour by varying the chemical potential or gate voltage. Between Landau levels, the density of states is suppressed, and by changing the graphene's Fermi energy, we cross from metallic to semiconducting regions. Hence, the corresponding Kondo behaviour is also influenced. The f-level spectral function reveals both the presence of Landau levels in the conduction band and the Kondo resonance.
Dóra Balázs
Thalmeier Peter
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