Superconductivity produced by electron doping in CuO/sub 2/-layered compounds
Journal Article
·
· Phys. Rev. Lett.; (United States)
We have discovered that the Ce/sup 4+/ doping and subsequent annealing in reducing atmosphere give rise to 24-K superconductivity in the Nd/sub 2/CuO/sub 4/-type structure with sheets of Cu-O squares. In contrast to the previously reported high-T/sub c/ cuprates, the charge carriers in the new superconductors are doped electrons, not holes; this was confirmed by the measurements of Hall and Seebeck coefficients as well as by chemical analysis of the effective copper valence. An anomalous dependence of T/sub c/ on the concentration of doped electrons is shown for these electron-doped superconducting cuprates.
- Research Organization:
- Engineering Research Institute, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
- OSTI ID:
- 6479734
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:10; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electron and hole doping in Nd-based cuprates with single-layer CuO/sub 2/ sheets: Role of doped Ce ions and 30-K superconductivity
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
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
Journal Article
·
Mon May 01 00:00:00 EDT 1989
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6114442
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
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
·
Thu Mar 31 23:00:00 EST 1994
· Journal of Superconductivity; (United States)
·
OSTI ID:6655065
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CATIONS
CERIUM COMPOUNDS
CERIUM IONS
CERIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HALL EFFECT
HEAT TREATMENTS
IONS
MATERIALS
METALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SEEBECK EFFECT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VALENCE
VERY LOW TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CATIONS
CERIUM COMPOUNDS
CERIUM IONS
CERIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HALL EFFECT
HEAT TREATMENTS
IONS
MATERIALS
METALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
SEEBECK EFFECT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VALENCE
VERY LOW TEMPERATURE