How many electrons are needed to flip a local spin?

Details How many electrons are needed to flip a local spin? How many electrons are needed to flip a local spin?

2004-10-29

arxiv.org/abs/cond-mat/0410775v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 figures

Scientific paper

10.1209/epl/i2004-10395-x

Considering the spin of a local magnetic atom as a quantum mechanical operator, we illustrate the dynamics of a local spin interacting with a ballistic electron represented by a wave packet. This approach improves the semi-classical approximation and provides a complete quantum mechanical understanding for spin transfer phenomena. Sending spin-polarized electrons towards a local magnetic atom one after another, we estimate the minimum number of electrons needed to flip a local spin.

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