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

Conference · Fri Apr 01 04:00:00 EST 1994 · Journal of Superconductivity; (United States)

OSTI ID:6655065

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)

We present investigations on the electronic structure of the recently discovered, electron-doped infinite-layer compound Sr[sub 1[minus]x]Nd[sub x]CuO[sub 2[minus][delta]] (T[sub c] approximately 40 K) by means of photoelectron spectroscopy with synchrotron radiation. This system is compared with the two closely related cuprates Nd[sub 2[minus]x]Ce[sub x]CuO[sub 4[minus][delta]] (electron doped) and Nd[sub 1.4]Ce[sub 0.2]Sr[sub 0.4]CuO[sub 4[minus][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 s] (p-doped system) cluster models. From our calculations we 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[minus][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[minus]x]Ce[sub x]CuO[sub 4[minus][delta]] and Nd[sub 1.4]Ce[sub 0.2]Sr[sub 0.4]CuO[sub 4[minus][delta]] gives very similar electronic parameters and antiferromagnetic correlations between Nd spins for both cuprates. 6 refs., 2 figs.

• OSTI ID: 6655065
• Report Number(s): CONF-930710--
• Conference Information: Journal Name: Journal of Superconductivity; (United States) Journal Volume: 7:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ACCELERATORS
ALKALINE EARTH METAL COMPOUNDS
CERAMICS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL DOPING
CRYSTALS
CUPRATES
CYCLIC ACCELERATORS
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
HIGH-TC SUPERCONDUCTORS
HOLES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
POLYCRYSTALS
RARE EARTH COMPOUNDS
SPECTROSCOPY
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
SYNCHROTRONS
TRANSITION ELEMENT COMPOUNDS