Article,

Fermi Surface of $Bi_2Sr_2CaCu_2O_8$

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Phys. Rev. Lett., 84 (19): 4449--4452 (May 2000)
DOI: 10.1103/PhysRevLett.84.4449

Abstract

We study the Fermi surface of Bi2Sr2CaCu2O8 using angle resolved photoemission spectroscopy (ARPES) with a momentum resolution of ~0.01 of the Brillouin zone. We show that, contrary to recent suggestions, the ARPES derived Fermi surface is a large hole barrel centered at (π,π), independent of the incident photon energy. We caution that the photon energy and k dependence of the matrix elements, if not properly accounted for, can lead to misinterpretation of ARPES intensities.

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