Zero-temperature statics and dynamics of a random-exchange model for magnetic properties of La sub 2 minus x Sr sub x CuO sub 4 in the insulating regime
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- Department of Physics, University of Missouri-Kansas City, Kansas City, Missouri 64110 (USA)
- Department of Physics, University of Wisconsin-Madison, Madison, WI (USA)
Results are presented for the zero-temperature statics and dynamics of a random-exchange model proposed for the magnetic properties of La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4}. Numerical calculations of the staggered magnetization, the static structure factor, the distribution and localization of the harmonic magnon modes, and the dynamic structure factor are reported for {ital c}{much lt}1, where {ital c} is the fraction of ferromagnetic exchange integrals in an otherwise perfect two-dimensional antiferromagnetic array with nearest-neighbor Heisenberg interactions. The relevance of the findings to the magnetic behavior of La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} in the insulating regime is assessed. It is pointed out that the model accounts for the crossover from antiferromagnetic to spin-glass behavior, the broadening of the static structure factor, and the renormalization of the spin-wave modes that occur with increasing hole concentration at low temperatures.
- OSTI ID:
- 6824062
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:1; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
EQUIPMENT
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360603* -- Materials-- Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
EQUIPMENT
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE