Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-12-23
Europhys. Lett. 65, 850 (2004)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, 2 eps figures included, minor changes
Scientific paper
10.1209/epl/i2003-10195-x
We study spin precession due to Rashba spin splitting of electrons and holes in semiconductor quantum wells. Based on a simple analytical expression that we derive for the current modulation in a broad class of experimental situations of ferromagnet/nonmagnetic semiconductor/ferromagnet hybrid structures, we conclude that the Datta-Das spin transistor (i) is feasible with holes and (ii) its functionality is not affected by integration over injection angles. The current modulation shows a universal oscillation period, irrespective of the different forms of the Rashba Hamiltonian for electrons and holes. The analytic formulas approximate extremely well exact numerical calculations of a more elaborate Kohn--Luttinger model.
Governale Michele
Konig Jurgen
Pala Marco G.
Zülicke Ulrich
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