Lattice instability in the normal state of La2-xSrxCuO4

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

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Novel softening has been found in the transverse elastic constant (C11-C12)/2 below 50 K in single-crystalline La1.86Sr0.14CuO4 (LSCO) by high-precision ultrasonic measurements in magnetic fields H along the c axis. With decreasing temperature, this lattice softening persists down to the superconducting transition temperature Tc(H), which is reduced to 14 K by applying fields up to 14 T. Below Tc(H) the softening turns to rapid hardening. This behavior indicates the presence of lattice instability of the orthorhombic (Bmab) structure in the normal state of LSCO, which disappears in the superconducting state. This is evidence for the intimate interplay between high-Tc superconductivity and the lattice instability in LSCO.

Original languageEnglish
Pages (from-to)419-421
Number of pages3
JournalJournal of Superconductivity
Issue number2
Publication statusPublished - Apr 1994
Externally publishedYes


  • Ultrasonic experiments
  • electron-phonon coupling
  • electronic band structure
  • lattice instability
  • single-crystalline LSCO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)


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