Recent content by DrBrainDead

Homework Statement I've got my exam in solid state physics tomorrow, and although I've understood most of the most complex subjects now, I feel I'm missing the understanding on one fundamental phenomena; Bragg reflection.. Throughout Kittel it's mentioned, that when we're at the first...

Naturally the masses will have to be of the same sign for anything to make sense; what I'm asking is why? The masses than enter the ln(x) are the effective masses, right? How is the equation then to be understood? Is the mass of the hole just assumed to be positive, or...?

Homework Statement In chapter 8, page 207 Kittel derives an equation for the fermi level in an intrinsic conductor: \mu=½Eg + \frac{3}{4}kBT*ln(me/mh) How am I to understand the ln(me/mh) part? Earlier he states that the effective mass is proportional to the curvature of the energy band...

Homework Statement Kittel states at page 172, that the central equation for the Fourier components of waves in a periodic lattice is given by: (\lambdak-E)*C(k)+\sumUG*C(k-G)=0 From this he goes on to say "Once we determine the C's from (27), the wavefunctions (25) is given as...