Time-Resolved Quasiparticle Dynamics in the Spin-Density-Wave State

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dc.creatorChia, Elbert E. M.
dc.creatorZhu, Jian-Xin
dc.creatorLee, H. J.
dc.creatorHur, Namjung
dc.creatorMoreno, N. O.
dc.creatorAveritt, R. D.
dc.creatorSarrao, J. L.
dc.creatorTaylor, A. J.
dc.date2006-10-12
dc.date.accessioned2026-07-07T07:27:29Z
dc.date.available2026-07-07T07:27:29Z
dc.descriptionTime-resolved photoinduced reflectivity is measured in the spin-density-wave (SDW) phase using itinerant antiferromagnets UMGa$_{5}$ (M=Ni, Pt). For UNiGa$_{5}$ [$T_{N}$=85 K, $Q$=($π$,$π$,$π$)], the relaxation time $τ$ shows a sharp increase at $T_{N}$ consistent with the opening of a SDW gap. For UPtGa$_{5}$ [$T_{N}$=26 K, $Q$=(0,0,$π$)], no change in $τ$ is observed at $T_{N}$ or at the lowest temperatures. We attribute this to the absence of the SDW gap at the Fermi level, due to a different modulation vector $Q$, which leads to a gapless quasiparticle spectrum. Our results challenge the conventional wisdom that a SDW phase necessarily implies a SDW gap at the Fermi level.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0610353
dc.identifierhttp://arxiv.org/abs/cond-mat/0610353
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/117392
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleTime-Resolved Quasiparticle Dynamics in the Spin-Density-Wave State
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