Influence of the pseudogap on the superconductivity-induced phonon renormalization in high-Tc superconductors

S. Varlamov; G. Seibold

doi:10.1103/PhysRevB.65.132504

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Influence of the pseudogap on the superconductivity-induced phonon renormalization in high-Tc superconductors

S. Varlamov, G. Seibold

DOI 10.1103/PhysRevB.65.132504 · Physical Review B

T1

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Abstract

We investigate the influence of a d-density wave (DDW) gap on the superconductivity-induced renormalization of phonon frequency and linewidth. The results are discussed with respect to Raman and inelastic neutron scattering experiments. It turns out that the DDW gap can enhance the range of frequencies for q=0 phonon softening depending on the underlying band structure. Moreover we show that an anisotropic “d-wave” pseudogap can also contribute to the q-dependent linewidth broadening of the 340 cm−1 phonon in YBa2Cu3O7.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	unknown
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown