Formation of an anisotropic energy gap in the valence-fluctuating system of CeNiSn

Takabatake, Toshiro; Teshima, F.; Fujii, H.; Nishigori, S.; Suzuki, Takashi; Fujita, Toshizo; Yamaguchi, Y.; Sakurai, J.; Jaccard, D.

doi:10.1103/physrevb.41.9607

Cited by 330 publications

(143 citation statements)

References 14 publications

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“…Furthermore, the electrical resistivity, ρ(T ), of valence fluctuating systems typically shows a Fermi liquid-like quadratic temperature dependence at low temperature and a shoulder in ρ(T ) at high temperatures. [4,5,6,7] The element Yb has an ambivalent character in a number of metallic compounds, resulting in an intermediate-valence state consisting of a temporal admixture of Yb 3+ (4f 13 ) and Yb 2+ (4f 14 ). [8] In particular, Yb compounds are also of interest because the trivalent Yb ion can be thought of as the 4f hole counterpart of the trivalent Ce ion, which has one electron in its 4f shell.…”

Section: Introductionmentioning

confidence: 99%

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇

Jang¹,

Bd²,

Ho³

et al. 2014

J. Phys.: Condens. Matter

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Abstract.A crossover from a non-Fermi liquid to a Fermi liquid phase in Yb 2 Ni 12 P 7 is observed by analyzing electrical resistivity ρ(T ), magnetic susceptibility χ(T ), specific heat C(T ), and thermoelectric power S(T ) measurements. The electronic contribution to specific heat, C e (T ), behaves as C e (T )/T ∼ − ln(T ) for 5 K < T < 15 K, which is consistent with non-Fermi liquid behavior. Below T ∼ 4 K, the upturn in C e (T )/T begins to saturate, suggesting that the system crosses over into a Fermi-liquid ground state. This is consistent with robust ρ(T )−ρ 0 = AT 2 behavior below T ∼ 4 K, with the power-law exponent becoming sub-quadratic for T > 4 K. A crossover between Fermiliquid and non-Fermi liquid behavior suggests that Yb 2 Ni 12 P 7 is in close proximity to a quantum critical point, in agreement with results from recent measurements of this compound under applied pressure.

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Section: Introductionmentioning

confidence: 99%

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇

Jang¹,

Bd²,

Ho³

et al. 2014

J. Phys.: Condens. Matter

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“…Other 4f compounds with insulating ground states are TmSe (A = 2 meV) [3], SmB6 0925-8388/92/$5.00 © 1992-Elsevier Sequoia. All rights reserved (A=3-4 meV) [41, YDB12 (A=6 meV) [5], CeFe4P12 (A=130 meV) [61, CeNiSn (A=0.5 meV) [7] and CeRhSb (A=0.4 meV) [8]. Some of these compounds are intermediate valence.…”

Section: Introductionmentioning

confidence: 99%

Gap-like magnetic excitation in the neutron-scattering response of Ce3Bi4Pt3

Severing

Thompson

Canfield

et al. 1992

Journal of Alloys and Compounds

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CeaBi4Pt a is a mixed valence compound with a gap in its electronic excitation spectrum. An Arrhenius plot of resistivity gives p-exp(--A/T), where A--5 meV. Inelastic neutron scattering experiments on CeaBi4Pta and also the isostructural lanthanum analogue reveal a gap in the spin-spin correlation function of CeaBi4Pta. At low temperatures the magnetic gap Am= 12 meV. Above 50 K the gap fills, becoming indiscernible at 150 K.

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“…Being much smaller than usual, doors are opened for the observation of phenomena usually unobservable. At high temperatures these systems can be described in terms of localized moments [27][28][29][30][31]. If in the HF state any low-temperature magnetic ordering is observed, it usually is antiferromagnetic.…”

Section: Heavy Fermionsmentioning

confidence: 99%

“…The outcome of the charge transfer considerations must be treated as an extra restriction for the used model. To satisfy photon emission experiments [30,40], we do not start with an empty f-level but with a single occupied f-level having a contact potential (without charge transfer and without hybridization) ¢o =/tA-/ta of 2eV. Charge transfer causes the effective contact potential to change into (still without hybridization) 4) = ¢o -PAnn.…”

Section: Charge Transfer Effectsmentioning

confidence: 99%

Spin fluctuations and heavy fermion behavior

Wyder

1995

Physica B: Condensed Matter

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Spin fluctuations and heavy fermion behaviorWyder, U. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractA heuristic approach to the relation of spin fluctuations (SF) and the heavy fermion (HF) state will be presented. The appearance of SF in the eigenstates of the periodic Anderson model is discussed in terms of relevant length scales, something already known for the Kondo problem but this time presented in a slightly more general framework. It will be shown that a specific form of SF can produce a HF-like state. The magnetic ordering, its small magnetic moment (using a Stoner-like criterion), charge transfer, and the magnetic field effect will be discussed.

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Formation of an anisotropic energy gap in the valence-fluctuating system of CeNiSn

Cited by 330 publications

References 14 publications

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇

Gap-like magnetic excitation in the neutron-scattering response of Ce3Bi4Pt3

Spin fluctuations and heavy fermion behavior

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Formation of an anisotropic energy gap in the valence-fluctuating system of CeNiSn

Cited by 330 publications

References 14 publications

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb2Ni12P7

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb2Ni12P7

Gap-like magnetic excitation in the neutron-scattering response of Ce3Bi4Pt3

Spin fluctuations and heavy fermion behavior

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Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇

Crossover between Fermi liquid and non-Fermi liquid behavior in the non-centrosymmetric compound Yb₂Ni₁₂P₇