A very large oxygen-isotope shift of the charge-stripe ordering temperature in the high-temperature superconductors La2-xSrxCuO4 has been observed using x-ray absorption spectroscopy, a fast (similar to 10(-15) seconds) and local probe (similar to 5 Angstrom). Upon replacing O-16 with O-18, the charge-stripe ordering temperature in La1.94Sr0.06CuO4 increases from about 110 K to 180 K. The present results provide compelling evidence for a strong electron-phonon interaction in this compound, and thus place important constraints on the microscopic origin of the stripe formation.
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Lanzara et al. (1999) studied this question.
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