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26 April 2024

» arxiv » cond-mat/9603044

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ARPES Study of the Superconducting Gap Anisotropy in Bi_2Sr_2CaCu_2O_8+x
H. Ding ; M. R. Norman ; J. C. Campuzano ; M. Randeria ; A. F. Bellman ; T. Yokoya ; T. Takahashi ; T. Mochiku ; K. Kadowaki ;
Date:	6 Mar 1996
Subject:	cond-mat supr-con
Abstract:	We report measurements of the momentum dependence of the superconducting gap in Bi_2Sr_2CaCu_2O_{8+x} (Bi2212) with angle-resolved photoemission spectroscopy using a dense sampling of the Brillouin zone in the vicinity of the Fermi surface. In the Y quadrant of the zone, where there are no complications from ghost bands caused by the superlattice, we find a gap function consistent within error bars to the form cos(k_x)-cos(k_y) expected for a d-wave order parameter. Similar results are found in the X quadrant with the photon polarization chosen to enhance main band emission over that due to ghost bands.
Source:	arXiv, cond-mat/9603044
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