The Kondo effect and weak localization

Details The Kondo effect and weak localization The Kondo effect and weak localization

2002-05-03

arxiv.org/abs/cond-mat/0205076v1

Nato Science Series II: Math. Phys. Chem. vol. 50, pp. 11-22 (2001)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Conference proceedings for the NATO Workshop on Size-dependent Magnetic Scatering held in Pecs, Hungary, 29 May-1 June (2000).

Scientific paper

The word Kondo means battle in Swahili. This coincidence is fortuitous because in the Kondo effect, a battle inevitably ensues anytime a magnetic impurity is placed in a non-magnetic metal. Below some energy scale, the Kondo temperature ($T_k$), a lone magnetic impurity is robbed of its spin. Above the Kondo temperature, rapid spin-flip scattering produces a temperature-dependent correction to the resistivity of the form, $B_k\ln T$. Until recently, both the Kondo resistivity and $T_k$ were thought to be determined solely by the host metal and the magnetic impurity. However, numerous presentations in this volume attest, there is now overwhelming evidence that both are affected by the size of the sample as well as non-magnetic random scattering. In this paper, I will focus on the theoretical work we have performed on the experiments revealing that non-magnetic scattering suppppresses the Kondo resistivity in thin Kondo alloys.

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