Double Josephson Plasma Resonance in T* Phase SmLa1−xSrxCuO4−δ
H. Shibata, T. Yamada
DOI 10.1103/PhysRevLett.81.3519 · Physical Review Letters
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Abstract
Far-infrared sphere resonance in T*-phase SmLa0.8Sr0.2CuO4−δ powder samples is measured down to 7cm−1. Below Tc, two peaks are observed at 11 and 30cm−1 for δ=0.05. Based on a comparison with the …S/I/S/I′/S/I/S/I′/S… ( …superconductor/insulator1/superconductor/insulator2/superconductor …)-type Josephson junction array model discussed by van der Marel and Tsvetkov [(Czech. J. Phys. 46, 3165 (1996)], these peaks are attributed to the Josephson plasma resonances of the intrinsic Josephson junctions at the fluorite-type Sm2O2 block layer and the rocksalt-type (La,Sr)2O2−δ block layer, respectively. The relation between the multiple Josephson plasma and the crystal structure of high- Tc cuprates is also discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SmLa0.8Sr0.2CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| SmLa0.8Sr0.2CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| SmLa1-xSrxCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.5 | Pressure not reported | unknown |
| SmLa1-xSrxCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
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