Silicon's hole mobility at room temperature and light doping is

PHYSICS · Multi-part · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Electronic transport in solids · Semiconductor physics and devices

Condensed Matter Physics, Ch Homogeneous semiconductors: counting carriers, doping and mobility

Problem

Silicon's hole mobility at room temperature and light doping is μp=480 cm2 V−1s−1\mu_p=480\,\mathrm{cm^2\,V^{-1}s^{-1}}, and the effective mass that governs a hole's motion is measured to be 0.37m0.37m. Find ((a)) the mean scattering time τ\tau, ((b)) the hole's thermal speed, ((c)) the mean free path, and ((d)) how many silicon lattice constants (a=5.43 A˚a=5.43\,\mathrm{\mathring{A}}) this represents.

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