Correlation between oxygen isotope effects on transition temperature and magnetic penetration depth in high-temperature superconductors close to optimal doping
R. Khasanov, A. Shengelaya, K. Conder, E. Morenzoni, I. M. Savić, J. Karpinski, H. Keller
DOI 10.1103/PhysRevB.74.064504 · Physical Review B
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Abstract
The oxygen-isotope (O16−O18) effect (OIE) on the in-plane magnetic penetration depth λab(0) in optimally doped YBa2Cu3O7−δ and La1.85Sr0.15CuO4, and in slightly underdoped YBa2Cu4O8 and Y0.8Pr0.2Ba2Cu3O7−δ was studied by means of muon-spin rotation. A substantial OIE on λab(0) with an OIE exponent βO=−dlnλab(0)∕dlnMO≈−0.2 (MO is the mass of the oxygen isotope), and a small OIE on the transition temperature Tc with an OIE exponent αO=−dlnTc∕dlnMO≃0.02–0.1 were observed. The observation of a substantial isotope effect on λab(0), even in cuprates where the OIE on Tc is small, indicates that lattice effects play an important role in cuprate high-temperature superconductors.
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. | 91.45 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.45 | Pressure not reported | onset |
| Y0.8Pr0.2Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 74 | Pressure not reported | onset |
| Y0.8Pr0.2Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 74 | Pressure not reported | onset |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80.86 | Pressure not reported | onset |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80.86 | Pressure not reported | onset |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.63 | Pressure not reported | onset |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.63 | Pressure not reported | onset |
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