The beauty of impurities: Two revivals of Friedel's virtual bound-state concept
Abstract
Jacques Friedel pioneered the theoretical study of impurities and magnetic impurities in metals. He discovered Friedel oscillations, introduced the concept of virtual bound-state, and demonstrated that the charge on the impurity is related to the scattering phase-shift at the Fermi level (Friedel sum-rule). After a brief review of some of these concepts, I describe how they proved useful in two new contexts. The first one concerns the Coulomb blockade in quantum dots, and its suppression by the Kondo effect. The second one is the dynamical mean-field theory of strong electronic correlations.
- Publication:
-
Comptes Rendus Physique
- Pub Date:
- March 2016
- DOI:
- 10.1016/j.crhy.2015.12.005
- Bibcode:
- 2016CRPhy..17..430G
- Keywords:
-
- Jacques Friedel;
- Virtual bound-state;
- Phase-shift;
- Friedel sum-rule;
- Kondo effect;
- Anderson impurity model;
- Coulomb blockade;
- Strong electronic correlations;
- Dynamical Mean-Field Theory;
- Mott transition