Spin dynamics of YBa sub 2 Cu sub 3 O sub 6+ x as revealed by NMR

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.11382· OSTI ID:5147601

Mila, F; Rice, T M ^[1]

---

1. Theoretische Physik, Eidgenossische Technische Hoch-schule-Zurich-Honggerberg, CH-8093 Zurich, Switzerland (CH)

We show that Knight-shift and relaxation-rate data at Cu and Y sites provide strong evidence in favor of the single-quantum-spin-fluid picture of YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. We also argue that this picture is not inconsistent with different temperature behaviors at Cu, O, and Y sites because of the strong antiferromagnetic correlations. We show explicitly that different power laws can be obtained at high temperature within the framework of a spin-wave approximation and comment on a possible gap in the spin excitation spectrum of YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}} larger the {ital T}{sub {ital c}}. However, this simple model does not allow a detailed account of the observed temperature dependences.

• OSTI ID: 5147601
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:16; 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
ALKALINE EARTH METAL COMPOUNDS
ANGULAR MOMENTUM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
KNIGHT SHIFT
MAGNETIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RELAXATION
SPIN
SPIN WAVES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES