Physics – Condensed Matter – Superconductivity
Scientific paper
2005-11-24
Physical Review B 72, 172511 (2005)
Physics
Condensed Matter
Superconductivity
4 pages, two figures
Scientific paper
10.1103/PhysRevB.72.172511
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.
Ando Yoichi
Basov Dimitri N.
Dordevic S. V.
Homes Christopher C.
Lee Young Sam
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