COLLECTIVE EXCITATIONS IN HIGH-TEMPERATURE SUPERCONDUCTORS

@article{Salkola1998COLLECTIVEEI,
  title={COLLECTIVE EXCITATIONS IN HIGH-TEMPERATURE SUPERCONDUCTORS},
  author={M. Salkola and J. Schrieffer},
  journal={Physical Review B},
  year={1998},
  volume={58}
}
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… Expand
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