Electronic properties of electron-doped Nd[sub 2-x]Ce[sub x]CuO[sub 4-[delta]], Sr[sub 1-x]Nd[sub x]CuO[sub 2-[delta]], and hole-doped Nd[sub 1. 4]Ce[sub 0. 2]Sr[sub 0. 4]CuO[sub 4-[delta]] studied by photoelectron spectroscopy

Conference · Thu Mar 31 23:00:00 EST 1994 · Journal of Superconductivity; (United States)

OSTI ID:6633231

Klauda, M; Markl, J; Fink, C; Lunz, P; Saemann-Ischenko, G ^[1]; Rau, F; Range, K J ^[2]

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1. Universitaet Erlangen (Germany)
2. Universitaet Regensburg (Germany)

The authors present investigations on the electronic structure of the recently discovered, electron-doped infinite-layer compound Sr[sub 1-x]Nd[sub x]CuO[sub 2-[delta]] (T[sub c][approx]40 K) by means of photoelectron spectroscopy with synchrotron radiation. This system is compared with the two closely related cuprates Nd[sub 2-x]Ce[sub x]CuO[sub 4-[delta]] (electron doped) and Nd[sub 1.4]Ce[sub 0.2]Sr[sub 0.4]CuO[sub 4-[delta]] (hole doped). Valence band spectra in the Cu 3p[yields]3d resonance are interpreted in terms of CuO[sub 4] (n-doped compounds) and CuO[sub 5] (p-doped system) cluster models. From the author's calculations they find a considerably higher Cu 3d Coulomb correlation for the electron-doped compounds as well as a very low Cu-O hybridization for the infinite-layer system. Partial Nd spectra of Sr[sub 0.85]Nd[sub 0.15]CuO[sub 2-[delta]] show the Nd dopants to be trivalent, thus confirming the infinite-layer compound to be electron doped. Analysis of partial Nd valence bands and magnetic susceptibilities of Nd[sub 2-x]Ce[sub x]CuO[sub 4-[delta]] and Nd[sub 1.4]Ce[sub 0.2]Sr[sub 0.4]CuO[sub 4-[delta]] gives very similar electronic parameters and antiferromagnetic correlations between Nd spins for both cuprates.

• OSTI ID: 6633231
• Report Number(s): CONF-930710--
• Journal Information: Journal of Superconductivity; (United States), Journal Name: Journal of Superconductivity; (United States) Vol. 7:2; ISSN JOUSEH; ISSN 0896-1107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS