"More is Different"
-Philip Warren Anderson
One Electron
87 Electrons
By Jan Ainali (Own work) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
Published online 03 February 2015
doi:10.1038/nphys3251 (2015) Year published: 99–100 Pages: 11, Volume: Nature Physics
Dy2Ti2O7, Ho2Ti2O7
Real Crystals
Crystal Structure
Same as Water Ice!
Excitation = Magnetic Monopole
0=\sum_{i\in\text{tet}} S_i
Ice Rule:
- Semiconductors
- Topological Insulators
- Quantum Hall Effect
- Majorana Particles
- Fractional Particles
- Non-abelian particles
Topics I Probably Won't Have Time For
