High Tc Superconductors -- A Variational Theory of the Superconducting State
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0305611,
title = {High Tc Superconductors -- A Variational Theory of the Superconducting State},
author = {Arun Paramekanti and Mohit Randeria and Nandini Trivedi},
journal= {arXiv preprint arXiv:cond-mat/0305611},
year = {2009}
}
Comments
(Minor revisions, 1 figure added, version to appear in PRB) 23 RevTeX pages, 11 eps figs, long version of cond-mat/0101121, contains detailed comparisons with experiments, analytical insights, technical aspects of the calculation, and comparison with slave boson MFT