Magnetic resonance in the model high-temperature superconductor HgBa 2CuO4+δ

G. Yu, Y. Li, E. M. Motoyama, X. Zhao, N. Barišić, Y. Cho, P. Bourges, K. Hradil, R. A. Mole, M. Greven

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Inelastic neutron-scattering measurements of single- CuO2-layer HgBa2 CuO4+δ reveal an antiferromagnetic resonance with energy ωr =56meV (≈6.8 kBTc) below the superconducting transition temperature Tc ≈96K. The resonance is energy-resolution limited and exhibits an intrinsic momentum width of about 0.2 Å-1, consistent with prior work on several other cuprates. The rather large value of ωr is identical to the characteristic energy of the electron-boson spectral density obtained from recent optical conductivity work, consistent with the notion that the charge carriers are strongly coupled to magnetic fluctuations.

Original languageEnglish (US)
Article number064518
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - Feb 26 2010


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