Depending on how they are
 modified, they can be called p or n type and have modified Fermi levels indicating a shift in their band gap.
 
A distribution function given for these materials is proportional to temperature raised to the three halves
 power and a constant equal to about 4.83 times ten to the twenty first power. Because of diffusion, parts of
 these materials can reach an equilibrium like state called a depletion region. Examples of these materials
 which are pure are called intrinsic and include mercury cadmium telluride. Depending on how they are
 modified, they can be called p or n type and have modified Fermi levels indicating a shift in their band gap.
 Gallium arsenide is a common example of these materials which have their properties altered through the
 introduction of impurities in a process called doping. For 10 points, name these materials that have
 properties between an insulator and a conductor.
A distribution function given for these materials is proportional to temperature raised to the three halves
 power and a constant equal to about 4.83 times ten to the twenty first power.
{semiconductor}