Physics 139, Fall 2024: Understanding the Meissner effect in superconductors
Topics that will be covered each week, roughly
- Week 0 (Sep 26)
Introduction to the course
- Week 1 (Sep 30)
What is a superconductor and why it's interesting
Superconducting materials overview: conventional, unconventional, hydrides
Basic properties of superconductors, especially the Meissner effect. Difference with perfect conductors.
- Week 2 (Oct 7)
History: how the Meissner effect was missed in 1924, then
discovered in 1933, and why it took so long
Lippmann's theorem
Different routes for the normal-superconductor transition in a magnetic field
London's two theories of electrodynamics of superconductors
- Week 3 (Oct 14)
Energetics of the Meissner effect
Four questions about the Meissner effect that need to be answered
Simply connected and multiply connected geometries
What Keesom's experiments tell us about the Meissner effect
- Week 4 (Oct 21)
Outline of the conventional (BCS) theory of superconductivity
What the conventional theory of superconductivity
says and doesn't say about the Meissner effect
Type I and type II superconductors
Why it is generally believed that the Meissner effect is understood
- Week 5 (Oct 28)
What Alfven's theorem tells us about the Meissner effect that BCS doesn't know.
What batteries tell us about the Meissner effect that BCS doesn't know.
What liquid 4He tells us about the Meissner effect that BCS doesn't know.
Pippard's calculation
- Week 6 (Nov 4)
What's wrong with London electrodynamics, and how to do it right
How superconductors know that electrons have negative charge
Rotating superconductors: the smoking gun
- Week 7 (Nov 11)
What Heisenberg, Peierls and Bloch knew in 1928 and BCS didn't in 1957
How supercurrents start flowing defying Newton's and Faraday's laws
How supercurrents stop flowing without generating Joule heat
How the Hall effect explains the Meissner effect
- Week 8 (Nov 18)
How equilibrium between normal and superconducting phases in a magnetic field
works
Alfven waves in superconductors
Superconducting wire: what it tells us about the Meissner effect
Electrostatic fields in and around superconductors
- Week 9 (Nov 25)
Mean inner potential of superconductors
Spin currents in superconductors; electrodynamics of charge and spin
Superconductors as macroscopic hydrogen atoms
Experiments that can and should be done
- Week 10 (Dec 2)
Quantum pressure
Early theories that got many things right yet were ignored
How the Meissner effect tells us where to look to find room temperature superconductors
How room temperature superconductors will change the world