Raman intensity of A1g phonons in dx2−y2 superconductors

E. Ya. Sherman; O. V. Misochko

doi:10.1103/PhysRevB.63.104520

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Raman intensity of A1g phonons in dx2−y2 superconductors

E. Ya. Sherman, O. V. Misochko

DOI 10.1103/PhysRevB.63.104520 · Physical Review B

T1

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Abstract

The Raman intensity anomaly for fully symmetrical phonons observed in the superconducting state of high-Tc superconductors is considered theoretically within a weak-coupling BCS theory. It is shown that the momentum relaxation of carriers, caused, e.g., by a disorder, enhances the contribution of the states near the Fermi surface to the phonon Raman intensity. This enhancement plays an important role in the intensity gain, arising due to opening of the superconducting gap.

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.	—	Pressure not reported	unknown
HgBa2Ca3Cu4O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Ba0.6K0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown