High Tc Superconductors -- A Variational Theory of the Superconducting State

Details High Tc Superconductors -- A Variational Theory of the Superconducting State High Tc Superconductors -- A Variational Theory of the Superconducting State

2003-05-26

arxiv.org/abs/cond-mat/0305611v3

Physics

Condensed Matter

Superconductivity

(Minor revisions, 1 figure added, version to appear in PRB) 23 RevTeX pages, 11 eps figs, long version of cond-mat/0101121, co

Scientific paper

10.1103/PhysRevB.70.054504

We use a variational approach to gain insight into the strongly correlated d-wave superconducting state of the high Tc cuprates at T=0. We show that strong correlations lead to qualitatively different trends in pairing and phase coherence: the pairing scale decreases monotonically with hole doping while the SC order parameter shows a non-monotonic dome. We obtain detailed results for the doping-dependence of a large number of experimentally observable quantities, including the chemical potential, coherence length, momentum distribution, nodal quasiparticle weight and dispersion, incoherent features in photoemission spectra, optical spectral weight and superfluid density. Most of our results are in remarkable quantitative agreement with existing data and some of our predictions, first reported in Phys. Rev. Lett. {\bf 87}, 217002 (2001), have been recently verified.

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