Electrical resistivity of YbInAu2 under hydrostatic pressure

Fuse, Akinori; Nobata, Tatsuhito; Nakamoto, G.; Kurisu, Makio

doi:10.1016/s0921-4526(99)01081-9

Cited by 4 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrostatic pressure dependence measurements of the dc resistivity of YbInAu 2 and its non-magnetic homologue LuInAu 2 have been carried out by Fuse et.al [58]. The experimental magnetic resistivity along with the residual resistivity (ρ mag + ρ 0 ) is shown in the inset of figure 10.…”

Section: Resistivity: Pressure Dependencementioning

confidence: 99%

See 1 more Smart Citation

From mixed valence to the Kondo lattice regime

Kumar¹,

Vidhyadhiraja²

2011

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Abstract. Many heavy fermion materials are known to crossover from the Kondo lattice regime to the mixed-valent regime or vice-versa as a function of pressure or doping. We study this crossover theoretically by employing the periodic Anderson model within the framework of the dynamical mean field theory. Changes occurring in the dynamics and transport across this crossover are highlighted. As the valence is decreased (increased) relative to the Kondo lattice regime, the Kondo resonance broadens significantly, while the lower (upper) Hubbard band moves closer to the Fermi level. The resistivity develops a two peak structure in the mixed valent regime: a low temperature coherence peak and a high temperature 'Hubbard band' peak. These two peaks merge yielding a broad shallow maximum upon decreasing the valence further. The optical conductivity, likewise exhibits an unusual absorption feature (shoulder) in the deep mid-infrared region, which grows in intensity with decreasing valence. The involvement of the Hubbard bands in dc transport, and of the effective f -level in the optical conductivity are shown to be responsible for the anomalous transport properties. A two-band hybridization-gap model, which neglects incoherent effects due to many-body scattering, commonly employed to understand the optical response in these materials is shown to be inadequate, especially in the mixed-valent regime. Comparison of theory with experiment carried out for (a) dc resistivities of CeRhIn 5 , Ce 2 Ni 3 Si 5 , CeFeGe 3 and YbIr 2 Si 2 ; (b) pressure dependent resistivity of YbInAu 2 and CeCu 6 ; and (c) optical conductivity measurements in YbIr 2 Si 2 yields excellent agreement.

show abstract

Section: Resistivity: Pressure Dependencementioning

confidence: 99%

“…Comparison of pressure dependent resistivity measurements (magnetic contribution only) for YbInAu 2 with theory. The inset shows the reported [58] experimental data.…”

Section: Resistivity: Dependencementioning

confidence: 99%

From mixed valence to the Kondo lattice regime

Kumar¹,

Vidhyadhiraja²

2011

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…5 A broad maximum appears at T max = 100 K in the magnetic susceptibility, and no magnetic order is observed down to 1.8 K. 6 Author to whom correspondence should be addressed; FAX: ϩ81-761-51-1149; electronic mail: kurisu@jaist.ac.jp have the magnetic electronic configuration ͑4f 13 ͒ even under low hydrostatic pressure smaller than 2 GPa or quasihydrostatic high pressure; an application of pressure enhances the magnetic moment of the compound, shifts the T max to lower temperature in the magnetic susceptibility, 7 and depresses the Kondo maximum temperature in the resistivity. 8,9 It is, therefore, of particular interest to make a systematic examination of these unusual pressure responses of the Yb ion in YbInAu 2 in terms of the valency of Yb ion at high pressure. As mentioned above, there should be the close relation between the IV states and the unit-cell volume in the compound.…”

Section: Introductionmentioning

confidence: 99%

The valence state of Yb ion in YbInAu2 compound at high pressure determined by x-ray diffraction and x-ray absorption near edge structure measurements

Fuse

Nakamoto

Ishimatsu

et al. 2006

Journal of Applied Physics

View full text Add to dashboard Cite

X-ray diffraction patterns and L III-edge x-ray absorption near edge structure ͑XANES͒ spectra of YbInAu 2 and LuInAu 2 compounds have been measured at high pressure and room temperature using a diamond anvil cell and a synchrotron radiation at SPring-8. YbInAu 2 is more compressible at pressures lower than 4 GPa than above it; the evaluated bulk modulus by Birch-type equation of state is 54.7 GPa which is one-half of that of the LuInAu 2 ͑112.5 GPa͒. The mean valence v of Yb ion in YbInAu 2 determined by the XANES measurement is an increasing function of pressure: 2.71͑2͒ at normal pressure and 2.94͑2͒ at 10 GPa. The rate of increase in v with pressure is two times larger at pressures below 4 GPa than that above 4 GPa. However, the v is described by a linear increasing function of the lattice compression: v = v 0 + 2.9͉⌬V / V 0 ͉ where v 0 is 2.71. The extrapolation to the trivalent state gives the critical pressure of 13 GPa.

show abstract

“…7͒ and YbInAu 2 . 8 It is our purpose in this work to investigate further the behavior of the properties of YbCu 3 Al 2 through a controlled tuning of the exchange interaction. This particular composition was chosen because the Yb valence is 3ϩ, and because T K is of the same magnitude as T RKKY ͑RKKY is Ruderman-Kittel-Kasuya-Yosida͒.…”

Section: Introductionmentioning

confidence: 99%

Unusual behavior of the Kondo temperature ofLa1−xYbxCu
Rojas
¹
,
Cardoso
²
,
Coelho
³

et al. 2001
Phys. Rev. B
8
0
5
0
View full text Add to dashboard Cite

Electrical-resistivity ͑͒, specific-heat ͑c͒, and magnetization ͑M͒ measurements were carried out for the series of compounds La 1Ϫx Yb x Cu 3 Al 2 (0рxр1). The resistivity results show two regions with a Ϫln T behavior, with different slopes that allows an estimation of the crystal-field ͑CF͒ splitting. Starting at xϭ1, the susceptibility is reduced to xϭ0.4, and this can be explained by the CF effect. Using the specific-heat and magnetic-susceptibility data, we were able to determine the Kondo temperature (T K), the crystal-field splitting, and the Debye temperature (D) for the whole series. T K was found to increase with the Yb concentration and with the corresponding unit-cell volume contraction. This behavior suggests the increase of the product ͉Jn(E f)͉ when the volume is reduced. This is the same trend found in Ce compounds, which is unusual for Yb compounds.

show abstract

Electrical resistivity of YbInAu2 under hydrostatic pressure

Cited by 4 publications

References 5 publications

From mixed valence to the Kondo lattice regime

From mixed valence to the Kondo lattice regime

The valence state of Yb ion in YbInAu2 compound at high pressure determined by x-ray diffraction and x-ray absorption near edge structure measurements

Unusual behavior of the Kondo temperature ofLa1−xYbxCu
Rojas
¹
,
Cardoso
²
,
Coelho
³

et al. 2001
Phys. Rev. B
8
0
5
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Electrical resistivity of YbInAu2 under hydrostatic pressure

Cited by 4 publications

References 5 publications

From mixed valence to the Kondo lattice regime

From mixed valence to the Kondo lattice regime

The valence state of Yb ion in YbInAu2 compound at high pressure determined by x-ray diffraction and x-ray absorption near edge structure measurements

Unusual behavior of the Kondo temperature ofLa1−xYbxCuRojas1, Cardoso2, Coelho3 et al. 2001Phys. Rev. B8050View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Unusual behavior of the Kondo temperature ofLa1−xYbxCu
Rojas
¹
,
Cardoso
²
,
Coelho
³

et al. 2001
Phys. Rev. B
8
0
5
0
View full text Add to dashboard Cite