Collective Excitations in High-Temperature Superconductors
Superconductivity
2009-10-30 v1
Abstract
Collective, low-energy excitations in quasi-two-dimensional d-wave superconductors are analyzed. While the long-range Coulomb interaction shifts the charge-density-wave and phase modes up to the plasma energy, the spin-density-wave excitation that arises due to a strong local electron-electron repulsion can propagate as a damped collective mode within the superconducting energy gap. It is suggested that these excitations are relevant to high-Tc superconductors, close to the antiferromagnetic phase boundary, and may explain some of the exotic features of the experimentally observed spectral-density and neutron-scattering data.
Cite
@article{arxiv.cond-mat/9712255,
title = {Collective Excitations in High-Temperature Superconductors},
author = {M. I. Salkola and J. R. Schrieffer},
journal= {arXiv preprint arXiv:cond-mat/9712255},
year = {2009}
}
Comments
5 jolly pages