We report topology of the Fermi surface of Bi2Sr2CaCu2O8+delta superconducting system at the optimum doping determined by sequential angle-scanning photoemission combined with high intensity of synchrotron radiation. The Fermi surface at the optimum doping has a pseudogap around (pi, 0) as in underdoped samples, showing missing segments near the M points, and shadow bands around (0.5 pi, 0.5 pi) and equivalent locations. The k dependence of the pseudogap shows a particular asymmetric topology that imposes a strong constraint on its theoretical explanation.
Topology of the pseudogap and shadow bands in Bi2Sr2CaCu2O8+d at optimum doping / Saini, N.L., J., A., Bianconi, A., A., L., M. C., A., S., T., G. D., G.u., N., K.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 79:(1997), pp. 3467-3470. [10.1103/PhysRevLett.79.3467]
Topology of the pseudogap and shadow bands in Bi2Sr2CaCu2O8+d at optimum doping
SAINI, Naurang Lal;BIANCONI, Antonio;
1997
Abstract
We report topology of the Fermi surface of Bi2Sr2CaCu2O8+delta superconducting system at the optimum doping determined by sequential angle-scanning photoemission combined with high intensity of synchrotron radiation. The Fermi surface at the optimum doping has a pseudogap around (pi, 0) as in underdoped samples, showing missing segments near the M points, and shadow bands around (0.5 pi, 0.5 pi) and equivalent locations. The k dependence of the pseudogap shows a particular asymmetric topology that imposes a strong constraint on its theoretical explanation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
