Interlayer Coupling and Superconducting Critical Temperature of Bi2Sr1.5La0.5CuO6+δ and Bi2Sr2CaCu2O8+δ: Incommensurate Effects of Pressure
A. Yurgens, D. Winkler, T. Claeson, T. Murayama, Y. Ando
DOI 10.1103/PhysRevLett.82.3148 · Physical Review Letters
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Abstract
The c-axis interlayer coupling of Bi2Sr1.5La0.5CuO6+δ and Bi2Sr2CaCu2O8+δ single crystals was changed by means of hydrostatic pressure P<1GPa resulting in a drastic increase of the c-axis critical current Ic (up to 270%GPa−1) and decrease of the normal state resistance Rn (down to −60%GPa−1). The superconducting critical temperature only slightly increases with a rate of ≈2%–6%GPa−1. The much stronger effect of pressure on Ic and Rn in Bi2Sr1.5La0.5CuO6+δ implies that the CuO-interlayer coupling has little effect on Tc in this compound.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr1.5La0.5CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.2 | Pressure unresolved | midpoint |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.4 | Pressure unresolved | midpoint |
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