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Unformatted text preview: ar room temperature? Hints: use Eq. 2.4 and 2.7 and look up the conductivity and/or resistivity of Cu. 6) Kasap 4.12 Updated 3/31/2011 10:36 PM 7) Spacing between energy levels and metals vs. semiconductors and insulators a. Assume that the scattering lifetime for an electron in pure, intrinsic Si at 0 Kelvin is 10‐6 sec. The effective mass in Si is me*=0.26 me where me is the rest mass of an electron of 9.11x10‐31 kg. Calculate the electric field that would be required to start an electron occupying the very highest state in the valence band moving and give it enough kinetic energy to overcome the band gap before one scattering event happened. b. Calculate the scattering lifetime for silver assuming its mobili...
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