Twelve > Semiconductor Devices
The conductivity of a pure semiconductor is roughly proportional to \( \rm T^{\frac{3}{2}} e^{\frac{- \triangle E}{2kT}} \) where ΔE is the band gap. The band gap for germanium is 0.74 eV at 4 K and 0.67 eV at 300 K. By what factor does the conductivity of pure germanium increase as the temperature is raised from 4 K to 300 K ?
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