Spin dynamics in D-wave superconductors

Hyekyung Won; Kazumi Maki

doi:10.1103/PhysRevB.49.15305

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Spin dynamics in D-wave superconductors

Hyekyung Won, Kazumi Maki

DOI 10.1103/PhysRevB.49.15305 · Physical Review B

T1

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Abstract

The dynamic spin-correlation function in the superconducting states (i.e., D wave and S wave) in the vicinity of the commensurate point Q=(π,π) is obtained within mean-field theory. As a model we take the generalized t-J model as analyzed by Tanamoto, Kohno, and Fukuyama though we interpret the fermion loop as associated with a renormalized hole. For T≥Tc where Tc is the superconducting transition temperature our result is essentially the same as Tanamoto, Kohno, and Fukuyama, but the superconducting correlation is easily incorporated within the present scheme. We find recent neutron-scattering data from both La1.86Sr0.14CuO4 by Mason et al. and YBa2Cu3O6+x by Rossat-Mignod et al. are consistent with the D-wave model but incompatible with the S-wave model.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.86Sr0.14CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6.92 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown