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One- and Two-Dimensional Magnetic Systems (1974)

Hone, D W ; Richards, P M

Palo Alto, Calif. : Annual Reviews

Annual Review of Materials Research 4 (1974), S. 337-363

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ISSN: 0084-6600

Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1146/annurev.ms.04.080174.002005

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A random phase approximation theory of nuclear relaxation in CuO2 planes (1990)

Bulut, N. ; Hone, D. W. ; Scalapino, D. J. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 67 (1990), S. 5079-5081

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Nuclear magnetic resonance experiments on the planar CuO2 materials related to high-Tc superconductors suggest that the doped holes are formed from the strongly hybridized Cu(3d)-O(2pσ) orbitals. Within this picture the doped metallic state can be viewed as a strongly interacting quantum liquid, with a dynamic spin susceptibility that reflects the local correlations produced by the Coulomb interactions. It is demonstrated that much of the essential observed behavior is predicted by a simple 2D Hubbard model within the RPA, with a suitable choice of parameters, and the physical implications of these parameters are discussed. The nuclear relaxation rates T−11 at various nuclear sites are calculated. The form factors of the hyperfine interaction act to spatially filter the spin susceptibility. In particular, the O form factor suppresses the antiferromagnetic fluctuations which dominate the relaxation of Cu nuclei, thereby reducing T−11 at O relative to that of Cu, as observed.