Role of two-dimensional electronic state in superconductivity in La2−xSrxCuO4
Fumihiko Nakamura, Tatsuo Goko, Junya Hori, Yoshinori Uno, Naoki Kikugawa, Toshizo Fujita
DOI 10.1103/PhysRevB.61.107 · Physical Review B
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Abstract
We have measured out-of-plane resistivity ρc for La2−xSrxCuO4 under anisotropic pressure. c-axis compression, which decreases ρc, reduces Tc drastically, whereas c-axis extension, which increases ρc, enhances Tc from 38 K at ambient pressure to 51.6 K at 8 GPa. We find that the variation of Tc scales as a function of ρc, and that the c-axis pressure coefficient is much stronger than the ab-axis one. These findings imply that Tc depends primarily on the interlayer, rather than the in-plane, lattice parameter.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure unresolved | zero_resistance |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 51.6 | 8 GPa | zero_resistance |
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