Nonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5

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dc.creatorPaglione, Johnpierre
dc.creatorTanatar, M. A.
dc.creatorHawthorn, D. G.
dc.creatorRonning, F.
dc.creatorHill, R. W.
dc.creatorSutherland, M.
dc.creatorTaillefer, Louis
dc.creatorPetrovic, C.
dc.date2006-05-04
dc.date2006-09-09
dc.date.accessioned2026-07-07T07:08:45Z
dc.date.available2026-07-07T07:08:45Z
dc.descriptionHeat and charge transport were used to probe the magnetic field-tuned quantum critical point in the heavy-fermion metal CeCoIn$_5$. A comparison of electrical and thermal resistivities reveals three characteristic energy scales. A Fermi-liquid regime is observed below $T_{FL}$, with both transport coefficients diverging in parallel and $T_{FL}\to 0$ as $H\to H_c$, the critical field. The characteristic temperature of antiferromagnetic spin fluctuations, $T_{SF}$, is tuned to a minimum but {\it finite} value at $H_c$, which coincides with the end of the $T$-linear regime in the electrical resistivity. A third temperature scale, $T_{QP}$, signals the formation of quasiparticles, as fermions of charge $e$ obeying the Wiedemann-Franz law. Unlike $T_{FL}$, it remains finite at $H_c$, so that the integrity of quasiparticles is preserved, even though the standard signature of Fermi-liquid theory fails.
dc.description4 pages, 4 figures (published version)
dc.identifierhttps://arxiv.org/abs/cond-mat/0605124
dc.identifierhttp://arxiv.org/abs/cond-mat/0605124
dc.identifierPhys. Rev. Lett. 97, 106606 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.106606
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110824
dc.subjectStrongly Correlated Electrons
dc.titleNonvanishing Energy Scales at the Quantum Critical Point of CeCoIn5
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