A complete Fermi surface in the normal state of superconducting Bi2Sr2CaCu2O8+delta at the optimum doping (T-c = 91 K) 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.0.23 Angstrom(-1) in the (pi, pi) direction, The pseudogap observed at (pi, 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 similar to 14 Angstrom large stripes.
Evidence for a striped phase of high Tc superconductor at the Fermi surface / Saini, Naurang Lal; J., Avila; M. C., Asensio; S., Tajima; G. D., Gu; N., Koshizuka; A., Valletta; A., Lanzara; Bianconi, Antonio. - In: ZEITSCHRIFT FÜR PHYSIK. B, CONDENSED MATTER. - ISSN 0722-3277. - STAMPA. - 104:(1997), pp. 703-706. [10.1007/s002570050512]
Evidence for a striped phase of high Tc superconductor at the Fermi surface
SAINI, Naurang Lal;BIANCONI, Antonio
1997
Abstract
A complete Fermi surface in the normal state of superconducting Bi2Sr2CaCu2O8+delta at the optimum doping (T-c = 91 K) 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.0.23 Angstrom(-1) in the (pi, pi) direction, The pseudogap observed at (pi, 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 similar to 14 Angstrom large stripes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
