https://doi.org/10.1140/epjb/e2011-20850-1
Regular Article
Friedel oscillation about a Friedel-Anderson impurity
Department of Physics & Astronomy University of Southern
California Los Angeles, California 90089-0484, USA
a e-mail: gerd.bergmann@gmail.com
Received: 18 October 2011
Received in final form: 20 November 2011
Published online: 23 January 2012
The Friedel oscillations in the vicinity of a Friedel-Anderson (FA) impurity are investigated numerically. For an FA impurity in the local moment limit the normalized amplitude A(ξ) is S-shaped, approximately zero at short distances, approaching two at large distances and crossing the value one at the characteristic length ξ1/2. Surprisingly, the Friedel oscillations of a simple non-interacting Friedel impurity with a narrow resonance at the Fermi level show a very similar behavior of their amplitude A(ξ). A comparison correlates the resonance width and the Kondo energy of the FA impurity with the characteristic length ξ1/2 of the Friedel oscillations.
Key words: Statistical and Nonlinear Physics
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012