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Strong-coupling Effects in cuprate High-$T_{c}$ Superconductors by magnetooptical studies

Y. S. Lee·Z. Q. Li·W. J. Padilla·S. V. Dordevic·C. C. Homes·Kouji Segawa·Yoichi Ando·D. N. Basov
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Abstract

Signatures of strong coupling effects in cuprate high-$T_{c}$ superconductors have been authenticated through a variety of spectroscopic probes. However, the microscopic nature of relevant excitations has not been agreed upon. Here we report on magneto-optical studies of the CuO$_{2}$ plane carrier dynamics in a prototypical high-$T_{c}$ superconductor YBa$%_{2} $Cu$_{3}$O$_{y}$ (YBCO). Infrared data are directly compared with earlier inelastic neutron scattering results by Dai \textit{et al}. [Nature (London) \textbf{406}, 965 (2000)] revealing a characteristic depression of the magnetic resonance in H $\parallel $ \textit{c} field less than 7 T. This analysis has allowed us to critically assess the role of magnetic degrees of freedom in producing strong coupling effects for YBCO system.

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Y. S. Lee, Z. Q. Li, W. J. Padilla, S. V. Dordevic, C. C. Homes, Kouji Segawa, Yoichi Ando, D. N. Basov. 2005-11-24. Strong-coupling Effects in cuprate High-$T_{c}$ Superconductors by magnetooptical studies. https://doi.org/10.1103/physrevb.72.172511

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