Latest Condensed Podcast Episodes

Lecture 22: Antiferromagnets

Solid State Physics - April 11, 2006 18:50
We finish off the low temperature corrections to the magnetization in a ferromagnet due to spin wave excitations, and also calculate the energy and heat capacity of spin waves. Now, on to antiferromagnets, where neighboring spins are antialigned. We derive the susceptibility, and the spin wave d...

Lecture 13: p-n Junctions

Solid State Physics - February 28, 2006 14:31
We talk more about holes today. They don't really exist, you know! But when only a few electrons are missing from the valence band, it's so much more convenient to describe only the missing states that the fictional particles we call "holes" are a very useful concept. We talk more about their ...

Lecture 5: Heat Capacity

Solid State Physics - January 31, 2006 15:53
We define the heat capacity, and calculate the phonon heat capacity in the high and low temperature limits. We also introduce the density of states. Technical difficulties meant that this lecture did not get recorded this year. In its place, I post last year's lecture 5: Lecture Audio