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Electronic properties of hole- and electron-doped [ital T][prime]-, [ital T][sup *]-, and infinite-layer-type high-[ital T][sub [ital c]] cuprates

Journal Article · · Physical Review, B: Condensed Matter; (United States)
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  1. Physikalisches Institut, Universitaet Erlangen-Nuernberg, Erwin-Rommel-Strasse 1, D-W 8520 Erlangen (Germany)
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We compare the electronic structure of [ital n]-type and [ital p]-type dopable high-[ital T][sub [ital c]] cuprates, namely the hole-doped Nd[sub 1.4]Ce[sub 0.2]Sr[sub 0.4]CuO[sub 4[minus][delta]] ([ital T][sup *]) system as well as the electron-doped Nd[sub 2[minus][ital x]]Ce[sub [ital x]]CuO[sub 4[minus][delta]] ([ital T][prime]) and Sr[sub 0.85]Nd[sub 0.15]CuO[sub 2[minus][delta]] ( infinite-layer'') systems. Investigations were done mainly by means of core-level and valence-band photoemission spectroscopy. Also we performed auxiliary measurements of Hall effect and magnetic susceptibility. From the investigations on the Cu-O layers we propose that one criterion for electron dopability in high-[ital T][sub [ital c]] cuprates is a comparatively high value of the Cu 3[ital d] Coulomb interaction [ital U][sub [ital d][ital d]]. This is concluded from model calculations on core-level and valence-band spectra. Also the superconducting infinite-layer compound Sr[sub 0.85]Nd[sub 0.15]CuO[sub 2[minus][delta]] exhibits (besides a remarkably low Cu-O hybridization) this enhanced value of [ital U][sub [ital d][ital d]]. For the rare-earth layers of [ital T][prime] and [ital T][sup *] we find small but characteristic differences in the electronic properties (Nd-O-hybridization and charge-transfer energy), which can be attributed to structural differences.
OSTI ID:
5654245
Journal Information:
Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:2; ISSN PRBMDO; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ANTIFERROMAGNETISM
CERIUM ADDITIONS
CERIUM ALLOYS
CHALCOGENIDES
CHARGE CARRIERS
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL FIELD
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTARY PARTICLES
EMISSION
FERMIONS
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
HOLES
IONS
LEPTONS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
NEODYMIUM COMPOUNDS
NEODYMIUM IONS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
PHYSICAL PROPERTIES
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
SECONDARY EMISSION
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS