Abstract
A complete Fermi surface in the normal state of superconducting Bi2Sr2CaCu2O8+δ at the optimum doping (T c = 91K) has been measured by angle scanning photoemission spectroscopy using synchrotron radiation. The Fermi surface reveals broken segments and hot spots of high photointensity along lines of k y = n:0:23A−1 in the (π; π) direction. The pseudogap observed at (π,0) in underdoped materials is one of this missing segments. The results indicate the presence of characteristic subbands of a superlattice of quantum stripes. This is formed by an ordered array of ∼ 14A large stripes.
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