Polarization Selection Rules and Superconducting Gap Anisotropy in $Bi_2Sr_2CaCu_2O_8$

M. R. Norman; M. Randeria; H. Ding; J. C. Campuzano; A. F. Bellman

doi:10.1103/PhysRevB.52.15107

Polarization Selection Rules and Superconducting Gap Anisotropy in $Bi_2Sr_2CaCu_2O_8$

Condensed Matter 2009-10-28 v1 supr-con

Authors: M. R. Norman , M. Randeria , H. Ding , J. C. Campuzano , A. F. Bellman

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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 $CuO_2$ 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.

Keywords

ARPES Bi2212 superconducting gap polarization selection rules umklapp d-wave

Cite

@article{arxiv.cond-mat/9507021,
  title  = {Polarization Selection Rules and Superconducting Gap Anisotropy in $Bi_2Sr_2CaCu_2O_8$},
  author = {M. R. Norman and M. Randeria and H. Ding and J. C. Campuzano and A. F. Bellman},
  journal= {arXiv preprint arXiv:cond-mat/9507021},
  year   = {2009}
}

Comments

3 pages, revtex, 3 uuencoded postscript figures

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