Resonating valence bond state in La/sub 2/CuO/sub 4/ and superconductivity
Journal Article
·
· Science (Washington, D.C.); (United States)
The oxide superconductors, particularly those recently discovered that are based on La/sub 2/CuO/sub 4/, have a set of peculiarities that suggest a common, unique mechanism: they tend in every case to occur near a metal-insulator transition into an odd-electron insulator with peculiar magnetic properties. This insulating phase is proposed to be the long-sought resonating-valence-bond state or quantum spin liquid hypothesized in 1973. This insulating magnetic phase is favored by low spin, low dimensionality, and magnetic frustration. The preexisting magnetic singlet pairs of the insulating state become charged superconducting pairs when the insulator is doped sufficiently strongly. The mechanism for superconductivity is hence predominantly electronic and magnetic, although weak phonon interactions may favor the state. Many unusual properties are predicted, especially of the insulating state.
- Research Organization:
- Princeton Univ., NJ
- OSTI ID:
- 6717258
- Journal Information:
- Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 235; ISSN SCIEA
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:1749892
Magnetic phase diagram and magnetic pairing in doped La/sub 2/CuO/sub 4/
Journal Article
·
Sun Mar 27 23:00:00 EST 1988
· Phys. Rev. Lett.; (United States)
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OSTI ID:5369542
Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL MODELS
DIELECTRIC PROPERTIES
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
HEISENBERG MODEL
INTERACTIONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETISM
MATERIALS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPIN
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL MODELS
DIELECTRIC PROPERTIES
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
HEISENBERG MODEL
INTERACTIONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETISM
MATERIALS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPIN
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS