Polarization Selection Rules and Superconducting Gap Anisotropy in $B{i}_{2}S{r}_{2}CaC{u}_2{O}_8$

Abstract

We discuss polarization selection rules for angle-resolved photoemission spectroscopy in Bi2212. Using these we show that the ``hump'' in the superconducting gap observed in the $X$ quadrant in our earlier work is not on the main $Cu{O}_2$ band, but rather on an umklapp band arising from the structural superlattice. The intrinsic gap is most likely quite small over a range of $\pm 10^{\circ }$ about the diagonal directions.

3 pages, revtex, 3 uuencoded postscript figures

References in corpus (2)

• Phenomenological Models for the Gap Anisotropy of Bi-2212 as Measured by ARPES
• Gap Renormalization in Dirty Anisotropic Superconductors: Implications for the Order Parameter of the Cuprates

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• Multiband Electronic Raman Scattering in Bilayer Superconductors
• d-Wave Order Parameter in Bi2212 from a Phenomenological Model of High T${}_c$ Cuprates
• Supercurrent-Induced Weyl Superconductivity
• Electron Self-Energy of High Temperature Superconductors as Revealed by Angle Resolved Photoemission
• About the influence of square-root Van Hove singularity on the critical temperature of high-Tc superconductors