Interplay between lattice softening and high-Tc superconductivity in La1.86Sr0.14CuO4

M. Nohara, T. Suzuki, Y. Maeno, T. Fujita, I. Tanaka, H. Kojima

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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.

Original languageEnglish
Pages (from-to)3447-3450
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number22
DOIs
Publication statusPublished - Jan 1 1993

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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