Dynamic Hubbard model, high temperature superconductivity and the Meissner effect
DIPC Seminars
- Speaker
-
Jorge E. Hirsch, University of California, San Diego (USA)
- When
-
2014/07/04
14:00 - Place
- Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4, Donostia
- Add to calendar
- iCal
Dynamic Hubbard models describe the physical fact that atomic orbitals expand
with increasing electronic occupation, unlike the conventional Hubbard model
that ignores this fact. I will show that dynamic Hubbard models lead to high
temperature superconductivity driven by lowering of electronic kinetic energy,
and to charge inhomogeneity in the normal state, a characteristic feature seen
in high temperature superconducting materials. I will also argue that dynamic
Hubbard models can explain the Meissner effect and the London moment seen in
all superconductors, while models where superconductivity is associated with
lowering of the electronic potential energy cannot.