Interplay between lattice softening and high-Tc superconductivity in La1.86Sr0.14CuO4
M. Nohara, T. Suzuki, Y. Maeno, T. Fujita, I. Tanaka, H. Kojima
DOI 10.1103/PhysRevLett.70.3447 · Physical Review Letters
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Abstract
High-resolution ultrasonic measurements have been performed on single-crystalline La1.86Sr0.14CuO4 in magnetic fields H up to 14 T. We found that by reducing temperature the transverse elastic constant (C11-C12)/2 starts to soften from about 50 K and continues to soften down to Tc(H), even when Tc(H) is reduced to 14 K by magnetic field. The softening turns to rapid hardening by the emergence of superconductivity. This behavior of C(11-C12)/2 is a consequence of the structural instability of the orthorhombic phase and disappearance of the instability caused by emergence of the superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.86Sr0.14CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | onset |
| La1.875Ba0.125CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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