A new heavy fermion superconductor: the filled skutterudite compound PrOs$_4$Sb$_{12}$

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dc.creatorMaple, M. B.
dc.creatorHo, P. -C.
dc.creatorFrederick, N. A.
dc.creatorZapf, V. S.
dc.creatorYuhasz, W. M.
dc.creatorBauer, E. D.
dc.date2003-03-19
dc.date.accessioned2026-07-07T02:50:15Z
dc.date.available2026-07-07T02:50:15Z
dc.descriptionThe filled skutterudite compound \PrOsSb{} exhibits superconductivity below a critical temperature $T_\mathrm{c} = 1.85$ K that develops out of a nonmagnetic heavy Fermi liquid with an effective mass $m^{*} \approx 50 m_\mathrm{e}$, where $m_\mathrm{e}$ is the free electron mass. Analysis of magnetic susceptibility, specific heat, electrical resistivity and inelastic neutron scattering measurements within the context of a cubic crystalline electric field yields a Pr$^{3+}$ energy level scheme that consists of a $Γ_{3}$ nonmagnetic doublet ground state that carries an electric quadrupole moment, a low lying $Γ_{5}$ triplet excited state at $\sim 10$ K, and $Γ_{4}$ triplet and $Γ_{1}$ singlet excited states at much higher temperatures. The superconducting state appears to be unconventional and to consist of two distinct superconducting phases. An ordered phase of magnetic or quadrupolar origin occurs at high fields and low temperatures, suggesting that the superconductivity may occur in the vicinity of a magnetic or electric quadrupolar quantum critical point.
dc.description12 pages, 6 figures, presented at the Strongly Correlated Electron Systems Conference, Krakow, 2002
dc.identifierhttps://arxiv.org/abs/cond-mat/0303370
dc.identifierhttp://arxiv.org/abs/cond-mat/0303370
dc.identifierActa Physica Polonica B v. 34, 919 (2003)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21044
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleA new heavy fermion superconductor: the filled skutterudite compound PrOs$_4$Sb$_{12}$
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