Spin fluctuations and superconductivity in Ba2YCu3O6

K. B. Lyons, P. A. Fleury, Lynn Schneemeyer, J. V. Waszczak

Research output: Contribution to journalArticle

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Abstract

We report observation of spin-pair excitations in Ba2YCu3O6, with in the range 0.0-0.9. The frequency of the excitations, and hence the value of the exchange constant, J=950 cm-1, is similar to that reported recently for (nonsuperconducting) La2CuO4. The present observation of magnetic excitations in a superconducting material, and of their evolution as a function of, demonstrate a large influence of carrier concentration on the spin-fluctuation dynamics.

Original languageEnglish
Pages (from-to)732-735
Number of pages4
JournalPhysical Review Letters
Volume60
Issue number8
DOIs
StatePublished - 1 Jan 1988

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Lyons, K. B. ; Fleury, P. A. ; Schneemeyer, Lynn ; Waszczak, J. V. / Spin fluctuations and superconductivity in Ba2YCu3O6. In: Physical Review Letters. 1988 ; Vol. 60, No. 8. pp. 732-735.
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Spin fluctuations and superconductivity in Ba2YCu3O6. / Lyons, K. B.; Fleury, P. A.; Schneemeyer, Lynn; Waszczak, J. V.

In: Physical Review Letters, Vol. 60, No. 8, 01.01.1988, p. 732-735.

Research output: Contribution to journalArticle

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AB - We report observation of spin-pair excitations in Ba2YCu3O6, with in the range 0.0-0.9. The frequency of the excitations, and hence the value of the exchange constant, J=950 cm-1, is similar to that reported recently for (nonsuperconducting) La2CuO4. The present observation of magnetic excitations in a superconducting material, and of their evolution as a function of, demonstrate a large influence of carrier concentration on the spin-fluctuation dynamics.

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