Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2004-06-07
Acta Physica Polonica A 106, 109 (2004)
Physics
Condensed Matter
Other Condensed Matter
5 pages, 4 figures; paper to a presentation at XXXIII International School on the Physics of Semiconductor Compounds Jaszowiec
Scientific paper
It is shown that magnetic bipolar transistors (MBT) can amplify currents even in the saturation regime, in which both the emitter-base and collector-base junctions are forward biased. The collector current and the current gain can change sign as they depend on the relative orientation of the equilibrium spin in the base and on the nonequilibrium spin in the emitter and collector. The predicted phenomena should be useful for electrical detection of nonequilibrium spins in semiconductors, as well as for magnetic control of current amplification and for current switching.
Fabian Jaroslav
Žutić Igor
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