Sharp resonant multiplet in femtosecond optical pair-breaking spectroscopy of optimally doped, underdoped, and Zn-doped YBa2Cu3O7−δ: Transient insulating regions in the superconducting state
Eric Li, R. P. Sharma, S. B. Ogale, Y. G. Zhao, T. Venkatesan, J. J. Li, W. L. Cao, C. H. Lee
DOI 10.1103/PhysRevB.65.184519 · Physical Review B
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Abstract
Femtosecond optical pair breaking spectroscopy is performed on optimally doped, underdoped, and Zn-doped YBa2Cu3O7−δ (YBCO) thin films near 1.5 eV. A sharp resonant triplet fine structure is seen. The systematics of the data for the three cases brings out the key role of Cu-O plane system in the attendant processes. The peak separations are attributable to the reported phonon and magnetic excitations in the system. These results strongly suggest the presence of insulating antiferromagnetic domains in the superconducting state of these YBCO systems on a subpicosecond time scale.
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. | 90 | Pressure unresolved | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure unresolved | onset |
| YBa2Cu2.8Zn0.2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure unresolved | onset |
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