Resonant neutron peak and the symmetry of the superconducting order parameter in YBa2Cu3O7

Tao Li; Zi-Zhao Gan

doi:10.1103/PhysRevB.60.3092

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Resonant neutron peak and the symmetry of the superconducting order parameter in YBa2Cu3O7

Tao Li, Zi-Zhao Gan

DOI 10.1103/PhysRevB.60.3092 · Physical Review B

T1

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Abstract

It is shown that the s±-wave pairing state proposed to interpret the resonant neutron peak observed in YBa2Cu3O7 corresponds to an interlayer pairing state and it has a drastically different magnetic behavior (in the odd channel) in the long wavelength limit as compared to the dx2−y2-wave state. It is found that the dx2−y2-wave state provides a more natural interpretation for the resonant peak, especially its sharpness in the momentum space which is a direct consequence of the d-wave symmetry of the order parameter. An experiment is proposed to decide which kind of pairing state is actually realized in YBa2Cu3O7.

Source-reported materials — not catalogue approval

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