2014
DOI: 10.1103/physrevb.89.094404
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Suppression of antiferromagnetic order and hybridization gap by electron and hole doping in the Kondo semiconductorCeOs2Al10

Abstract: The Kondo semiconductor CeOs 2 Al 10 exhibits an antiferromagnetic (AFM) order at T N = 28.5 K, whose temperature is unexpectedly high for the small ordered moment of 0.3 µ B /Ce. We have studied the effects of electron-and hole-doping on the hybridization gap and AFM order by measuring the magnetization M , magnetic susceptibility χ, electrical resistivity ρ, and specific heat C on single crystals of Ce(Os 1−x Ir x ) 2 Al 10 (x ≤ 0.15) and Ce(Os 1−y Re y ) 2 Al 10 (y ≤ 0.1). The results of M (B) indicates tha… Show more

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Cited by 32 publications
(45 citation statements)
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“…It is interesting to note that the resistivity of slightly electron-(8% Ir) and hole-(2% Re) doped CeOs 2 Al 10 exhibits metallic behavior in all directions below T N [24].…”
Section: A Bulk Propertiesmentioning
confidence: 99%
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“…It is interesting to note that the resistivity of slightly electron-(8% Ir) and hole-(2% Re) doped CeOs 2 Al 10 exhibits metallic behavior in all directions below T N [24].…”
Section: A Bulk Propertiesmentioning
confidence: 99%
“…The effects of electron (Ir/Rh) and hole (Re) doping on the transition metal site in CeT 2 Al 10 (T = Ru and Os) have been investigated, through magnetization, resistivity, muon spin rotation (µSR), and neutron scattering (both elastic and inelastic) [10,11,24]. These studies show the general trend that the hybridization between 4f −electrons and conduction electrons increases with hole-doping, while the Ce-4f electrons become more localized with electron-doping.…”
Section: Introductionmentioning
confidence: 99%
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“…Among the strongly correlated electron systems, several rare-earth compounds, known as hybridization gap semiconductors or Kondo-insulators/semiconductors, have recently attracted great interest [1][2][3][4][5][6][7][8][9][10][11]. Kondo-insulators belong to a class of strongly correlated materials that form a group of either nonmagnetic semiconductors with a narrow-gap or semimetals with tiny gaps.…”
Section: Introductionmentioning
confidence: 99%
“…Differently from heavy fermions systems, in Kondo-insulators the heavy-electron band is completely filled and the chemical potential falls in the middle of the hybridization gap (half-filling condition [12]). This semiconducting state manifests when the pseudogap straddles the Fermi energy, and is subjected to many-body renormalizations, leading to a T-dependent reduction of its magnitude [1,[3][4][5][6][7][8][9][10][11][13][14][15][16][17]. Among new and interesting compounds with properties being related to this model are Ce-based filled skutterudites compounds [18].…”
Section: Introductionmentioning
confidence: 99%