Fermi Surface Reconstruction in CeRh$_{1-x}$Co$_{x}$In$_{5}$

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dc.creatorGoh, Swee K.
dc.creatorPaglione, Johnpierre
dc.creatorSutherland, Mike
dc.creatorO'Farrell, E. C. T.
dc.creatorBergemann, C.
dc.creatorSayles, T. A.
dc.creatorMaple, M. B.
dc.date2008-03-31
dc.date2008-07-30
dc.date.accessioned2026-07-07T09:53:23Z
dc.date.available2026-07-07T09:53:23Z
dc.descriptionThe evolution of the Fermi surface of CeRh$_{1-x}$Co$_x$In$_5$ was studied as a function of Co concentration $x$ via measurements of the de Haas-van Alphen effect. By measuring the angular dependence of quantum oscillation frequencies, we identify a Fermi surface sheet with $f$-electron character which undergoes an abrupt change in topology as $x$ is varied. Surprisingly, this reconstruction does not occur at the quantum critical concentration $x_c$, where antiferromagnetism is suppressed to T=0. Instead we establish that this sudden change occurs well below $x_c$, at the concentration x ~ 0.4 where long range magnetic order alters its character and superconductivity appears. Across all concentrations, the cyclotron effective mass of this sheet does not diverge, suggesting that critical behavior is not exhibited equally on all parts of the Fermi surface.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0803.4424
dc.identifierhttp://arxiv.org/abs/0803.4424
dc.identifierPhys. Rev. Lett. 101, 056402 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.056402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165938
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleFermi Surface Reconstruction in CeRh$_{1-x}$Co$_{x}$In$_{5}$
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