1305.4169 (Alejandro M. Lobos et al.)

Spectral evolution of the SU(4) Kondo effect from the single impurity to
the two-dimensional limit    [PDF]

Alejandro M. Lobos, Marcelo Romero, Armando A. Aligia

We have derived a Hubbard-Anderson model which describes a two-dimensional array of atoms or molecules with two-fold orbital degeneracy, acting as magnetic impurities and interacting with a metallic host. We calculate the differential conductance for different arrangements of impurities on a metallic surface: a single impurity, a periodic square lattice, and several sites of a rectangular cluster. The results agree with recent experimental results using scanning tunneling spectroscopy in different systems of of iron(II) phtalocyanine molecules deposited on top of Au(111) [N. Tsukahara et al., Phys. Rev. Lett. 106, 187201 (2011)].

View original: http://arxiv.org/abs/1305.4169