INVESTIGADORES
BARRAL Maria Andrea
artículos
Título:
Hybridization of impurity states with the Shockley surface band versus bulk states
Autor/es:
MARÍA ANDREA BARRAL; ANA MARÍA LLOIS; ARMANDO ALIGIA
Revista:
PHYSICAL REVIEW B - SOLID STATE
Editorial:
The American Physical Society
Referencias:
Lugar: Nueva York; Año: 2004 vol. 70 p. 35416 - 35423
ISSN:
0556-2805
Resumen:
The characteristics of the Shockley surface states on Cus111d in the presence of Co impurity adsorbates are studied by means of one electron calculation performed using a well parametrized Hamiltonian in a local basis. Local densities of states in the spillover region as well as the relative hybridization strengths of Co d orbitals with bulk and surface states are obtained. We show that Co 3d orbitals hybridize mostly with Cu bulk conduction states, thus giving ground to recent experimental results [N. Knorr, M. A. Schneider, L. Diekhoner, P. Wahl, and K. Kern, Phys. Rev. Lett. 88, 096804 (2002)] in the sense that the observed Kondo resonances are being dominated by Cu bulk electrons.