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Spin-polarized tunneling through single crystal GaAs(001) barriers

Kreuzer, S. ; Moser, Jürgen ; Wegscheider, Werner ; Weiss, Dieter ; Bichler, M. ; Schuh, Dieter


We investigate spin-dependent transport through an epitaxial GaAs(001) barrier sandwiched between polycrystalline iron films. Electron transport through the barrier is dominated by quantum mechanical tunneling, demonstrated by a nonlinear I�V characteristic, an exponential dependence of the tunneling current on the barrier thickness and the temperature dependence of the current. Though ...


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