- #1
jeffbarrington
- 24
- 1
So some materials have sub-bands of the valence band, known as heavy and light holes (they have different curvature so different effective masses, this I understand). Sources seem to give different reasons for this, either because of anistropy in the crystal or some sort of coupling effect, but suffice to say the degeneracy is lifted, somehow.
What about the conduction bands? I have never seen anybody talk about 'heavy' or 'light' electrons (save for people talking about muons or hypothesising about some less-massive version of an electron - but that's particle physics and completely different).
Why aren't there sub-bands of the conduction band? Or can there be such a thing, and I just haven't looked hard enough?
What about the conduction bands? I have never seen anybody talk about 'heavy' or 'light' electrons (save for people talking about muons or hypothesising about some less-massive version of an electron - but that's particle physics and completely different).
Why aren't there sub-bands of the conduction band? Or can there be such a thing, and I just haven't looked hard enough?