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Absence of an isotope effect in the magnetic resonance in high-$T_c$ superconductors

S. Pailhès·P. Bourges·Y. Sidis·C. Bernhard·B. Keimer·C. T. Lin·J. L. Tallon
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Abstract

An inelastic neutron scattering experiment has been performed in the high-temperature superconductor $\rm YBa_2Cu_3O_{6.89}$ to search for an oxygen-isotope shift of the well-known magnetic resonance mode at 41 meV. Contrary to a recent prediction (I. Eremin, {\it et al.}, Phys. Rev. B {\bf 69}, 094517 (2004)), a negligible shift (at best $\leq$ +0.2 meV) of the resonance energy is observed upon oxygen isotope substitution ($^{16}$O$\to^{18}$O). This suggests a negligible spin-phonon interaction in the high-$T_c$ cuprates at optimal doping.

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S. Pailhès, P. Bourges, Y. Sidis, C. Bernhard, B. Keimer, C. T. Lin, J. L. Tallon. 2005-05-16. Absence of an isotope effect in the magnetic resonance in high-$T_c$ superconductors. https://doi.org/10.1103/physrevb.71.220507

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