Spin excitations and pairing gaps in the superconducting state of YBa2Cu3O7−δ

Hartmut Monien; David Pines

doi:10.1103/PhysRevB.41.6297

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Spin excitations and pairing gaps in the superconducting state of YBa2Cu3O7−δ

Hartmut Monien, David Pines

DOI 10.1103/PhysRevB.41.6297 · Physical Review B

T1

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Abstract

We show that it is possible to give a quantitative account of the temperature dependence of the measurements of the Knight shift and the spin-lattice-relaxation times for planar copper and oxygen sites in the superconducting state of YBa2Cu3O7−δ by assuming that the planar excitations form a strongly coupled antiferromagnetic Fermi liquid. We consider anisotropic singlet and triplet pairing states with an orbital momentum l≤2 and report on gap parameters and antiferromagnetic enhancement factors that are consistent with experiment. We present as well our calculations for the chain sites, for which an additional relaxation mechanism appears required.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown