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Unformatted text preview: pb . The electron energy is such that E pa =E pc <E<E pb and ONLY electron motion in the +x direction is considered, (i.e. there are no reflections at either the x=0 or x=L boundary) . Part a) determine the probability of the electron tunneling from x=0 to x=L (your answer will be written in terms of algebraic variables). Hint: use the exponential form of the wave function and your boundary conditions between regions. Part b) If the electron has energy E= ½kT eV (equal to the peak in the energy distribution above the conduction band) and the barrier E pbE pa =0.34 eV as could be found for an GaAsAlGaAs barrier, what is the probability of tunneling (numeric answer) for the electron having an effective mass of 0.067m o at room temperature for a 2 nm barrier....
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 Spring '08
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 electron tunneling, barrier EpbEpa=0.34 eV

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