Kondo Resonance — Spin-Flip Scattering

Magnetic impurity screening in a metallic host · Abrikosov-Suhl resonance

Total DOS
Impurity DOS
Free electron

Parameters

Physics

TK = D·exp(-1/2Jρ)
ρimp(ε) = Γ/π / [(ε-εd)²+Γ²]
ρKondo(ε) ∝ ΓK/[(ε/kBTK)²+ΓK²]
The Kondo effect: a magnetic impurity in a metal is screened by conduction electrons below TK, forming a many-body singlet. A sharp Abrikosov-Suhl resonance appears at the Fermi level, enhancing resistivity.

Resistivity ρ(T)

ρ ∝ 1/[1+(T/TK)²] — rises logarithmically below TK