Inelastic neutron scattering study of CeNi2Ge2

Frost, Christopher; Rainford, B.D.; Carter, F.V.; Saxena, S. S.

doi:10.1016/s0921-4526(99)01480-5

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…A recent study on CeNi 2 Ge 2 claims the first observation of CF structures in INS experiments on this compound, giving values that correspond rather well with our results. 59 In summary, the comparison shows that all of our re- sults are in reasonable agreement with the values from the other methods. This is surprising because of two possible problems in our method: 1.)…”

Section: Quantitative Spectral Analysis: Fitting With Ncasupporting

confidence: 83%

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

et al. 2007

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We present a high-resolution photoemission study on the strongly correlated Ce-compounds CeCu6, CeCu2Si2, CeRu2Si2, CeNi2Ge2, and CeSi2. Using a normalization procedure based on a division by the Fermi-Dirac distribution we get access to the spectral density of states up to an energy of 5kBT above the Fermi energy EF . Thus we can resolve the Kondo resonance and the crystal field (CF) fine-structure for different temperatures above and around the Kondo temperature TK. The CF peaks are identified with multiple Kondo resonances within the multiorbital Anderson impurity model. Our theoretical 4f spectra, calculated from an extended non-crossing approximation (NCA), describe consistently the observed photoemission features and their temperature dependence. By fitting the NCA spectra to the experimental data and extrapolating the former to low temperatures, TK can be extracted quantitatively. The resulting values for TK and the crystal field energies are in excellent agreement with the results from bulk sensitive measurements, e.g. inelastic neutron scattering. PACS numbers: 71.27.+a 71.28.+d 79.60.-i 71.10.-w

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Section: Quantitative Spectral Analysis: Fitting With Ncasupporting

confidence: 83%

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

et al. 2007

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Impact of the ground-state 4f symmetry for anisotropic cf hybridization in the heavy-fermion superconductor CeNi2Ge
Fujiwara,
Nakatani,
Aratani
et al. 2023
Phys. Rev. B
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Spin gap inCeFe4Sb12studied by heat capacity and inelastic neutron scattering

et al. 2007

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The magnetic properties of the skutterudite compound CeFe 4 Sb 12 have been investigated by heat capacity and inelastic neutron scattering measurements. Heat capacity measurements reveal a broad peak centered at 125 K, whose magnitude is much larger than that expected from a Schottky anomaly due to a cubic crystal electric field. At 5 K, inelastic neutron scattering experiments clearly show the existence of a broad magnetic peak at 40͑3͒ meV. The absence of quasielastic scattering at this temperature, together with the almost total account of the magnetic signal in the inelastic peak, shows that the excitation has a different origin than a splitting of the electronic levels due to crystal field energy. Instead, we propose a model in which the signal originates from inelastic excitations across two hybridization bands near the Fermi energy, usually referred to as a spin gap. A simple phenomenological two-level model can account for the peak in the specific heat, with a spin-gap energy of 36͑2͒ meV, which is in very good agreement with the inelastic scattering data. Further, at 300 K, the inelastic response becomes purely quasielastic, which is in agreement with the theoretical calculations. Interestingly, the spin-gap energy in CeFe 4 Sb 12 exhibits a universal scaling behavior with the Kondo temperature T K. The relation between the spin-gap energy and the associated anomalies in the heat capacity or thermal expansion is discussed for a series of Ce-and Yb-based compounds.

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Inelastic neutron scattering study of CeNi2Ge2

Cited by 3 publications

References 5 publications

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

Impact of the ground-state 4f symmetry for anisotropic cf hybridization in the heavy-fermion superconductor CeNi2Ge
Fujiwara,
Nakatani,
Aratani
et al. 2023
Phys. Rev. B
0
0
0
0
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Spin gap inCeFe4Sb12studied by heat capacity and inelastic neutron scattering

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Inelastic neutron scattering study of CeNi2Ge2

Cited by 3 publications

References 5 publications

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

High-resolution photoemission study on low-TKCe systems: Kondo resonance, crystal field structures, and their temperature dependence

Impact of the ground-state 4f symmetry for anisotropic cf hybridization in the heavy-fermion superconductor CeNi2GeFujiwara, Nakatani, Aratani et al. 2023Phys. Rev. B0000View full textAdd to dashboardCite

Spin gap inCeFe4Sb12studied by heat capacity and inelastic neutron scattering

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Impact of the ground-state 4f symmetry for anisotropic cf hybridization in the heavy-fermion superconductor CeNi2Ge
Fujiwara,
Nakatani,
Aratani
et al. 2023
Phys. Rev. B
0
0
0
0
View full text Add to dashboard Cite