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Evidence for a striped phase of high Tc superconductor at the Fermi surface

Zeitschrift fur Physik B-Condensed Matter, ISSN: 0722-3277, Vol: 104, Issue: 4, Page: 703-706
1997
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A complete Fermi surface in the normal state of superconducting BiiSriCaCu-4Og+a at the optimum doping (Tc - 91 K) has been measured by angle scanning photoemission spectroscopy using synchrotron radiation. The Fermi surface reveals broken segments and hot spots of high pho-tointensity along lines of Ay = n.0.23A in the (TT, TT) direction. The pseudogap observed at (/r,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. © Springer-Verlag 1997.

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