From a76cf05a7e238de790c99c456a7860bc46005ec7 Mon Sep 17 00:00:00 2001
From: "T. van der Sar" <t.vandersar@tudelft.nl>
Date: Mon, 14 Jan 2019 21:37:18 +0000
Subject: [PATCH] Update lecture_4.md - added LG to lecture 4B
---
src/lecture_4.md | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/lecture_4.md b/src/lecture_4.md
index eadad1f..9728744 100644
--- a/src/lecture_4.md
+++ b/src/lecture_4.md
@@ -260,6 +260,7 @@ Also a sanity check: when the energy is close to the bottom of the band, $E = E_
- formulate equations of motion for electrons or phonons in 1D for systems with more than one degree of freedom per unit cell.
- solve these equations to arrive at the dispersion relation.
- derive the group velocity, effective mass, and density of states.
+ - explain what happens with the band structure when the periodicity of the lattice is increased or reduced.
### More hoppings in LCAO
--
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