Fermi Surface Topology of Bi2Sr2CaCu2O8+d at hν=33eV: hole or electron-like?
A. D. Gromko, Y. -D. Chuang, D. S. Dessau, K. Nakamura, Yoichi Ando
Abstract
We present new results from Angle-Resolved Photoemission experiments (ARPES) on overdoped Bi2Sr2CaCu2O8+d (BSCCO) crystals. With greatly improved energy and momentum resolution, we clearly identify the existence of electron-like portions of the Fermi Surface (FS) near M at hν=33eV. This is consistent with previously reported data and is robust against various FS crossing criteria. It is not due to an artifact induced from k-dependent matrix element effects. We also present evidence for a breakage in the FS pointing to the possible existence of two types of electronic components.
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