Solid State Physics in a Nutshell: Topic 10-1: Thermal & Optical Excitations

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Today, we develop a description of thermal and optical excitations in intrinsic semiconductors. We consider both direct and indirect transitions.
  1. Solid State Physics in a Nutshell
  2. Solid-state Physics (Field Of Study)
  3. Solid (Phase Of Matter)
  4. Semiconductor (Literature Subject)
  5. Chemistry (Field Of Study)
  6. Materials Science (Field Of Study)
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hey you guys, love your videos! ( i know theyve been out there a while, i just discovered them). However there are two issues here: i think you missed that your schroedinger equation (diff. eq. of second order) can only have to linearly independent solutions, so the drawing for the semimetal at 1:42 is not possible, since you have 4 different k values for one energy were the bands overlap.
also i think you mixed up the energy conservation laws for the phonon processes (7:13). for phonon creation the phonon energy should be included on the rhs of the equation and for destruction on the lhs.

kippjonathan