Help with solid state problems

1. Jul 4, 2003

eljose79

I had to pass an exam of solid state but i had some doubts with this problems

a)let be a pure semiconductor in two dimensions then they ask you for the density of electrons....would you use the formula

n**2=Nc*Pv*Exp(-Eg/K2T) ?...

another question is to obtain the density of holes in the valence band..what is the expresion?.

b)g(e)=g(e1)*g(e2) then *= is + (summed) or X (multiplication)

c)How varies the density of states with pressure?..will the width of the g(e) increase or decrease?..

hope someone can help..

2. Jul 9, 2003

Tom Mattson

Staff Emeritus
Moving to Physics.

3. Jul 10, 2003

heumpje

It might help if you defined the symbols a bit further. What is Pv or Nc..