Collective excitations in high-temperature superconductors

M. I. Salkola; J. R. Schrieffer

doi:10.1103/PhysRevB.58.R5944

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Collective excitations in high-temperature superconductors

M. I. Salkola, J. R. Schrieffer

DOI 10.1103/PhysRevB.58.R5944 · Physical Review B

T1

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Abstract

Collective, low-energy excitations in quasi-two-dimensional d-wave superconductors are explored. 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. These excitations are suggested to be relevant to high-Tc superconductors, near the antiferromagnetic phase boundary, and may lead to distinctive signatures in spectral-density and neutron-scattering data.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.6-xNdySrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown