Collective Excitations in High-Temperature Superconductors

Details Collective Excitations in High-Temperature Superconductors Collective Excitations in High-Temperature Superconductors

1997-12-20

arxiv.org/abs/cond-mat/9712255v1

Physics

Condensed Matter

Superconductivity

5 jolly pages

Scientific paper

10.1103/PhysRevB.58.R5944

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.

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