ISSN:
1432-0630
Keywords:
PACS:71.25.Hc; 74.72.Hs; 79.60.Bm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract . Core-level X-ray photoelectron-diffraction patterns have been measured from cleaved Bi2Sr2CaCu2- O8+δ (001) surfaces for all elements present in this compound. The incommensurate modulation along b ( [010] ) leads to a strong inequivalence of a- and b- directions for Bi, Sr and Cu photoelectrons, while Ca and O emission show less effect. Ultraviolet-photoemission experiments rec ording the emission intensity at the Fermi energy over a large solid angle are also presented, providing a direct mapping of the Fermi surface. A c(2×2) superstructure is observed on the Fermi surface suggest ing antiferromagnetic correlations within the Cu–O planes. The effects of the lattice modulation are clearly observable at the Fermi energy, and they are enhanced for binding energies higher than a few tens of meV.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01538399
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