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

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

2005-03-09

arxiv.org/abs/cond-mat/0503208v2

Phys. Rev. B 71, 220507(R) (2005)

Physics

Condensed Matter

Superconductivity

3 figures

Scientific paper

10.1103/PhysRevB.71.220507

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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