Two characteristic energies in the low-energy antiferromagnetic response of the electron-doped high-temperature superconductor Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$

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dc.creatorYu, G.
dc.creatorLi, Y.
dc.creatorMotoyama, E. M.
dc.creatorHradil, K.
dc.creatorMole, R. A.
dc.creatorGreven, M.
dc.date2008-03-22
dc.date2008-11-29
dc.date.accessioned2026-07-07T12:05:45Z
dc.date.available2026-07-07T12:05:45Z
dc.descriptionInelastic neutron scattering for Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$ near optimal doping ($x \approx 0.155$, $T_{c} = 25 \mathrm{K}$) reveals that the dynamic magnetic susceptibility at the antiferromagnetic zone center exhibits two characteristic energies in the superconducting state: $ω_1 \approx 6.4 \mathrm{meV}$ and $ω_2 \approx 4.5 \mathrm{meV}$. These two magnetic energies agree $quantitatively$ with the $B_{1g}$ / $B_{2g}$ and $A_{1g}$ features previously observed in electronic Raman scattering, where the former is believed to indicate the maximum electronic gap and the origin of the smaller $A_{1g}$ feature has remained unexplained. The susceptibility change upon cooling into the superconducting state is inconsistent with previous claims of the existence of a magnetic resonance mode near 10 meV, but consistent with a resonance at $ω_2$.
dc.description5 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0803.3250
dc.identifierhttp://arxiv.org/abs/0803.3250
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208461
dc.subjectSuperconductivity
dc.titleTwo characteristic energies in the low-energy antiferromagnetic response of the electron-doped high-temperature superconductor Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$
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