In-plane transport properties of single-crystal R sub 2 minus x Ce sub x CuO sub 4 minus y ( R =Nd,Sm)

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.13606· OSTI ID:5561905

Hagen, S J; Peng, J L; Li, Z Y; Greene, R L ^[1]

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1. Center for Superconductivity Research, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742-4111 (USA)

We have investigated the in-plane transport properties of high-quality crystals of {ital R}{sub 2{minus}{ital x}}Ce{sub {ital x}}CuO{sub 4{minus}{ital y}} ({ital R}=Nd,Sm) prepared over a range of Ce contents {ital x}. We find the Hall coefficient {ital R}{sub {ital H}} is uniformly negative in superconducting ({ital x} near 0.15) and underdoped crystals, indicating electron conduction in the CuO{sub 2} planes, and becomes positive at large doping ({ital x}{similar to}0.2). The in-plane resistivity remains metallic over this range and decreases monotonically as {ital x} increases, consistent with an increasing carrier density. These data confirm results on ceramic samples and demonstrate that electron doping in the {ital T}{prime}-phase superconductors and hole doping in the {ital T}-phase systems affect transport in the same way.

• OSTI ID: 5561905
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:16; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
ELECTRICAL PROPERTIES
COPPER OXIDES
NEODYMIUM OXIDES
SAMARIUM OXIDES
CARRIER DENSITY
ELECTRIC CONDUCTIVITY
ELECTRON MICROSCOPY
HALL EFFECT
MONOCRYSTALS
X-RAY DIFFRACTION
CERIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTALS
DIFFRACTION
MICROSCOPY
NEODYMIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties