Spin polarons in high- Tc copper oxides: Differences between electron- and hole-doped systems

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.950· OSTI ID:6638436

Lu, J P; Si, Q ^[1]

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1. The Department of Physics, The University of Chicago, Chicago, IL (USA) The James Franck Institute, The University of Chicago, Chicago, IL (USA)

It is argued that in the small-doping region there is an asymmetry between the hole-doped and the electron-doped copper oxide systems. This asymmetry is reflected in both the magnetic and transport properties. Significant oxygen {ital p}-{ital p} orbital overlap leads to a large conduction-band width, which has qualitatively different effects on the two differently doped systems. In the hole-doped case, large-spin polarons are formed as the system is doped; this leads to a quick destruction of the antiferromagnetic correlation. In the electron-doped case, doped carriers are more localized; thus the magnetic correlation is more robust with respect to doping. In the low doping concentration, the low-temperature conductivity is shown to be two-dimensional variable-range-hopping type. The conductivity, which is expected to scale with the asymmetry of the magnetic phase diagram, is smaller in an electron-doped system than that of a hole-doped system.

• OSTI ID: 6638436
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:1; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ASYMMETRY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HIGH-TC SUPERCONDUCTORS
HOLES
LEPTONS
MAGNETIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POLARONS
QUASI PARTICLES
SPIN
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS