Importance of structural instability to high-temperature superconductivity

A. Bussmann-Holder, A. Migliori, Z. Fisk, J. L. Sarrao, R. G. Leisure, S. W. Cheong

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The orthorhombic-tetragonal structural phase transition of La2-xSrxCuO4 is quantitatively analyzed as a function of composition x within an anharmonic electron-phonon interaction model. The correct temperature dependence of the soft mode and the elastic constant c66 is obtained. The double-well potential in the electron-phonon interaction is derived self-consistently and found to vary strongly with x. In the vicinity of the superconducting transition temperature Tc electrontwo-phonon interactions dominate the harmonic ones which may explain the high Tcs observed.

Original languageEnglish (US)
Pages (from-to)512-515
Number of pages4
JournalPhysical review letters
Volume67
Issue number4
DOIs
StatePublished - 1991

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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