Phys. Rev. B 56, 8426–8431 (1997)Phonon self-energy effects due to superconductivity in Bi2Sr2CaCu2O8+δReceived 20 November 1996; published in the issue dated 1 October 1997 Raman scattering of A1g phonons in Bi2Sr2CaCu2O8+δ single crystals (δ=0.13, Tc=86K) has been measured as a function of temperature. We report an anomalous softening in the frequency and a decrease in the linewidth of the A1g phonon at 290cm-1 (O1,2 c-axis in-phase vibration) below Tc. We also confirm a smaller anomalous softening in the frequency of the A1g phonon at 465cm-1 (O3 c-axis vibration), but for this phonon mode no linewidth anomaly has been found. We compare the anomalous softening and linewidth behavior in the superconducting state with theoretical calculations for isotropic s-wave, planar d-wave, and dx2-y2 gap symmetries and as for a layered superconductor model. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.8426
DOI:
10.1103/PhysRevB.56.8426
PACS:
78.30.Hv, 71.70.-d, 63.20.Ls
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.