Spin-spin correlation in the quantum critical regime of La[sub 2]CuO[sub 4]
Journal Article
·
· Physical Review Letters; (United States)
- Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606 (Japan)
We report measurements of the [sup 63]Cu nuclear spin echo decay rate [sup 63]1/[ital T][sub 2[ital G]] in the paramagnetic state of a quasi-two-dimensional antiferromagnet La[sub 2]CuO[sub 4] up to 900 K, and from it deduce the temperature dependence of the spin-spin correlation length [xi]. [xi] shows a crossover from [xi][similar to]exp([ital J]/[ital k][sub [ital B]T]) in the renormalized classical regime ([ital T][approx lt]600 K) to [xi][similar to][ital J]/[ital k][sub [ital B]T] in the quantum critical regime ([ital T][approx gt]600 K), where [ital J] is exchange interaction. Our finding that the ratio [sup 63][ital T][sub 1][ital T]/[sup 63][ital T][sub 2[ital G]] is temperature independent, where [sup 63][ital T][sub 1] is the [sup 63]Cu nuclear spin-lattice relaxation time, gives clear evidence for quantum critical scaling.
- DOE Contract Number:
- FG02-91ER45439
- OSTI ID:
- 6050020
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:8; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER 63
COPPER COMPOUNDS
COPPER ISOTOPES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC RESONANCE
MAGNETISM
NUCLEAR MAGNETIC RESONANCE
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
RELAXATION
RESONANCE
SPIN ECHO
SPIN-LATTICE RELAXATION
SPIN-SPIN RELAXATION
STABLE ISOTOPES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER 63
COPPER COMPOUNDS
COPPER ISOTOPES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC RESONANCE
MAGNETISM
NUCLEAR MAGNETIC RESONANCE
NUCLEAR QUADRUPOLE RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
RELAXATION
RESONANCE
SPIN ECHO
SPIN-LATTICE RELAXATION
SPIN-SPIN RELAXATION
STABLE ISOTOPES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TRANSITION ELEMENT COMPOUNDS