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  1. 1 Acta Physica Polonica A

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  1. 1 2004

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  1. 1 Fabian J.

  2. 1 Žutić I.

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Spin Switch and Spin Amplifier: Magnetic Bipolar Transistor in the Saturation Regime

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Fabian J., Žutić I.
Acta Physica Polonica A
|
2004
|
vol. 106
|
issue 2
109-118
EN
It is shown that magnetic bipolar transistors 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.
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