Experimental test of the interlayer pairing models for high-Tc superconductivity using grazing-incidence infrared reflectometry
J. Schützmann, H. S. Somal, A. A. Tsvetkov, D. van der Marel, G. E. J. Koops, N. Koleshnikov, Z. F. Ren, J. H. Wang, E. Brück, A. A. Menovsky
DOI 10.1103/PhysRevB.55.11118 · Physical Review B
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Abstract
From measurements of the far-infrared reflectivity at grazing angles of incidence with p-polarized light we determined the c-axis Josephson plasma frequencies of the single layer high-Tc cuprates Tl2Ba2CuO6 and La2−xSrxCuO4. We detected a strong plasma resonance at 50 cm−1 for La2−xSrxCuO4 in excellent agreement with previously published results. For Tl2Ba2CuO6 we were able to determine an upper limit of the unscreened c-axis Josephson plasma frequency 100 cm−1 or a c-axis penetration depth >15 μm. The small value of ωJ stands in contrast to recent a prediction based on the interlayer tunneling mechanism of superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32 | Pressure not reported | unknown |
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