Andreev Peaks and Massive Magnons in Cuprate Superconductor-Normal-Superconductor Junctions

Assa Auerbach; Ehud Altman

doi:10.1103/PhysRevLett.85.3480

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Andreev Peaks and Massive Magnons in Cuprate Superconductor-Normal-Superconductor Junctions

Assa Auerbach, Ehud Altman

DOI 10.1103/PhysRevLett.85.3480 · Physical Review Letters

T1

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Abstract

The projected SO(5) theory [pSO(5)] is used to resolve the puzzle of two distinct energy gaps in high Tc superconductor-normal-superconductor junctions. Counter to the conventional theory of multiple Andreev reflections (MAR), the differential resistance peaks are associated with the antiferromagnetic resonance observed in neutron scattering, and not with Cooper pair breaking. The pSO(5) and MAR theories differ by the expected tunneling charges at the peaks. We propose that shot noise experiments could discriminate against the conventional interpretation.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O6.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu2.55Fe0.45Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6-d Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	52	Pressure not reported	unknown
YBa2Cu3O6-d Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	92	Pressure not reported	unknown