Volume 69, Number 4, February 2005
|Page(s)||595 - 601|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||21 January 2005|
How many electrons are needed to flip a local spin?
Theoretical Physics Institute and Department of Physics, University of Alberta Edmonton, Alberta, Canada, T6G 2J1
Accepted: 16 December 2004
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.
PACS: 72.25.-b – Spin polarized transport / 73.23.Ad – Ballistic transport / 73.63.-b – Electronic transport in nanoscale materials and structures
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.