Event Date Details:
Refreshments served at 3:40 pm.
- Broida 1640
- Physics Colloquium
The parent compounds of copper-oxide superconductors are antiferromagnetic insulators. Doping holes into the copper-oxide planes quickly kills the commensurate antiferromagnetic order; nevertheless, dynamic antiferromagnetic correlations survive and coexist with the superconductivity that is induced by a sufficient density of holes. What is the nature of the spin fluctuations and how do they relate to the superconductivity? Do antiferromagnetic correlations compete or contribute to superconductivity? Studies of the original cuprate superconductor, La2-xBaxCuO4, have revealed a state with ordered charge and spin stripes that coexist with two-dimensional superconductivity. The strong spectroscopic similarities of this compound to other cuprates suggest that it provides important clues to the nature of their shared superconductivity.