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

Abstract

An inelastic neutron scattering experiment has been performed in the high-temperature superconductor $\mathrm{YB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{6.89}$ 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 $\le$ +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.

arXiv comment3 figures

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Cited by in corpus (7)

• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• Gap anisotropy and universal pairing scale in a spin fluctuation model for cuprates
• Doping Dependence of Bilayer Resonant Spin Excitations in $(\mathbf{Y},\mathbf{Ca})\mathbf{B}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6+\mathbf{x}}$
• Characteristics of oxygen isotope substitutions in the quasiparticle spectrum of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Spin-phonon coupling, q-dependence of spin excitations and high-T${}_C$ superconductivity from band models
• Identifying Collective Modes via Impurities in the Cuprate Superconductors
• Paramagnonlike excitations and spin diffusion in magnetic resonance studies of copper oxide superconductors