Renormalization-group study of a magnetic impurity in a Luttinger liquid
Department of Physics, University of Florida,
Gainesville, Florida 32611-8440, USA
Accepted: 27 July 1997
A generalized Anderson model for a magnetic impurity in an interacting one-dimensional electron gas is studied via a mapping onto a classical Coulomb gas. For weak potential scattering, the local-moment parameter regime expands as repulsive bulk interactions become stronger, but the Kondo scale for the quenching of the impurity moment varies non-monotonically. There also exist two regimes dominated by backward potential scattering: one in which the impurity is non-magnetic, and another in which an unquenched local moment survives down to very low temperatures.
PACS: 72.15.Qm – Scattering mechanisms and Kondo effect / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions
© EDP Sciences, 1997