A hypothetical insulator has a band gap of

PHYSICS · Subjective · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Semiconductor physics and devices · Semiconductor physics and devices

Condensed Matter Physics, Ch Tight binding, band filling and the three kinds of solid

Problem

A hypothetical insulator has a band gap of 3.0 eV3.0\ \mathrm{eV}. Using the half-gap rule and ignoring its slowly varying prefactor, estimate the temperature at which this insulator's resistivity would fall to silicon's measured room-temperature value.

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