Transport and Thermodynamic Properties of High-Tc Superconductors Calculated from the Energy-Momentum Dispersion.

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• James Storey, Victoria University, New Zealand
• Wednesday 17 October 2007, 11:15-12:15
• Mott Seminar Room, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Michael Sutherland.

By calculating the electronic entropy, superfluid density, thermoelectric power and spin susceptibility from ARPES derived energy-momentum dispersions we establish overall consistency among these techniques. In light of these calculations the experimental data reveals the approach of the Fermi level to a van Hove singularity in the overdoped regime, thereby forcing a revision of theories based on the so-called ‘van Hove scenario’. Comparison of the Tc phase diagram with the density of states at the Fermi level allows us to propose a universal pairing potential that reproduces both the doping dependence of Tc, as well as the variation in Tc,max between different species of cuprate superconductors.

This talk is part of the Quantum Matter Seminar series.

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