Metallic State in Cubic FeGe beyond its Quantum Phase Transition

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dc.creatorPedrazzini, P.
dc.creatorWilhelm, H.
dc.creatorJaccard, D.
dc.creatorJarlborg, T.
dc.creatorSchmidt, M.
dc.creatorHanfland, M.
dc.creatorAkselrud, L.
dc.creatorYuan, H. Q.
dc.creatorSchwarz, U.
dc.creatorGrin, Yu.
dc.creatorSteglich, F.
dc.date2006-06-19
dc.date.accessioned2026-07-07T07:49:15Z
dc.date.available2026-07-07T07:49:15Z
dc.descriptionWe report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order ($T_C=280$ K) is suppressed at a critical pressure $p_c\approx 19$ GPa. An anomaly in the resistivity data at $T_X(p)$ and strong deviations from a Fermi-liquid behavior in a wide pressure range above $p_c$ suggest that the suppression of $T_C$ disagrees with the standard notion of a quantum critical phase transition. The metallic ground state persisting at high pressure can be described by band-structure calculations if structural disorder due to zero-point motion is included. Discontinuous changes in the pressure dependence of the shortest Fe-Ge interatomic distance occurring close to the $T_C(p)$ phase line could be interpreted as a symmetry-conserving transition of first order.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0606493
dc.identifierhttp://arxiv.org/abs/cond-mat/0606493
dc.identifierPhys. Rev. Lett. 98, 047204 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.047204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124780
dc.subjectStrongly Correlated Electrons
dc.titleMetallic State in Cubic FeGe beyond its Quantum Phase Transition
dc.typetext

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