Properties of magnetic impurity in a metal
Ovchinnikov Yu.N., Dyugaev A.M., Kresin V.Z., Fulde P.
The effect of a polarized conduction-electron cloud back on a magnetic impurity dissolved in a metal is studied. It is shown that at a temperature Tc much higher than the Kondo temperature the system becomes unstable against symmetry breaking and that a state with (5,)y0 is established. The behaviour of (Sz) is derived for all temperatures and magnetic fields except for a very narrow region around Tc and for very low temperatures. The minute role of Kondo-type processes in establishing the symmetry-broken state is pointed out. PACS: 72.l5.Eb