De Haas-van Alphen studies of rare earth compounds

Settai, Rikio; Ebihara, Takao; Takashita, M.; Sugawara, Hitoshi; Kimura, Noriaki; Motoki, K.; Ōnuki, Yoshichika; Uji, S.; Aoki, Haruyoshi

doi:10.1016/0304-8853(94)01454-x

Cited by 10 publications

(13 citation statements)

References 5 publications

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“…3. 27 If we assume that the only affect pressure will have on the Fermi surface is to increase m*, this orbit is very similar to our measured largest orbit for Bʈ͓001͔ of F 1 Јϭ3450 T with m*ϭ4.8 for CeRhIn 5 at ambient pressure. While we have observed many more dHvA oscillations in CeRhIn 5 relative to CeIn 3 due to the more complicated crystal structure of CeRhIn 5 , our choice of starting with compressed CeIn 3 to approximate the electronic structure of CeRhIn 5 again seems to have merit for Bʈ͓001͔.…”

Section: De Haas-van Alphen Effectsupporting

confidence: 63%

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Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

et al. 2000

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We have used high pulsed magnetic fields to 50 T to observe de Haas-van Alphen oscillations in the tetragonal antiferromagnet CeRhIn 5 , which has an enhanced value of the electronic specific heat coefficient ␥տ420 mJ/mol K 2 . For TϽT N , the specific heat data at zero applied magnetic field are consistent with the existence of an anisotropic spin-density wave opening a gap in the Fermi surface. The low-temperature magnetization reveals a magnetic phase transition that appears to be first order in nature. Quantum oscillations, which are observed for TϽT N when Bʈ͓100͔ and Bʈ͓001͔, reveal an anisotropic Fermi surface. The temperature dependence of the amplitudes of the quantum oscillations shows anomalous behavior for Bʈ͓001͔ as a maximum at T*Ϸ1.2 K is observed which we attribute to a gap opening in the anisotropic Fermi surface. The electronic and magnetic properties are anisotropic due to the quasi-two-dimensional crystal structure.

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Section: De Haas-van Alphen Effectsupporting

confidence: 63%

“…Also, the dHvA masses and electronic specific heat coefficient are similar to those of bulk CeIn 3 . 11,27,28 Because of this, we believe we are observing the entire Fermi surface of CeRhIn 5 , though it is impossible to conclude this with absolute certainty.…”

Section: De Haas-van Alphen Effectmentioning

confidence: 99%

Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

et al. 2000

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“…The cyclotron mass m Ã c of branch d is highly anisotropic regarding the magnetic field direction: m Ã c ¼ 2 { 3m 0 for the h100i direction and 12 {16m 0 for h110i. 53,57) Moreover, two kinds of branches named d and d 0 are observed only for H k h111i:…”

Section: Pressure-induced Heavy-fermion Superconductivity Inmentioning

confidence: 99%

Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties

2007

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We present the recent advances in Ce-based heavy fermion superconductivity. Heavy fermions are formed by the competition between the Ruderman-Kittel-Kasuya-Yosida interaction and the Kondo effect. The application of pressure is useful for controlling the electronic states in antiferromagnets such as CeRh 2 Si 2 , Ce 2 Ni 3 Ge 5 , CeIn 3 , CeRhIn 5 , and CeIrSi 3 . For these compounds, the Néel temperature T N decreases with increasing pressure and reaches zero at the quantum critical pressure P c . Superconductivity appears around P c . In CeRu 2 , CeCoIn 5 , and CePt 3 Si, superconductivity is realized at ambient pressure. For these pressure-induced and ambient-pressure superconductors, we clarified their unconventional characteristics of superconductivity, the close relationship between superconductivity and the dimensionality of the electronic states, and a new aspect of superconductivity in the noncentrosymmetric crystal structure, together with its Fermi surface instability at P c .

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“…(2) and (3), there are many pieces of experimental evidence that the phase of the dHvA oscillations or the spin splitting factor can be assumed to change approximately with the effective mass rather than with band mass. 2,7,9,32) When A " ! A # , eq.…”

Section: Phase Shift Analysismentioning

confidence: 99%

Evolution of Fermi Surface Properties in Ce_xLa_1-xB₆ and Pr_xLa_1-xB₆

et al. 2006

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We report the de Haas-van Alphen (dHvA) effect measurements of the Fermi surface properties in LaB 6 , Ce x La 1Àx B 6 (x ¼ 0:1, 0.25, 0.5, 0.75, 1.0) and Pr x La 1Àx B 6 (x ¼ 0:25, 0.5, 0.75, 1.0) with particular attention to the spin dependence of the Fermi surface properties. The Fermi surface shape and dimension of Ce x La 1Àx B 6 change considerably with Ce concentration, while those of Pr x La 1Àx B 6 change very slightly up to x ¼ 0:75, and in PrB 6 the Fermi surface splits into the up and down spin Fermi surfaces. The effective mass of Ce x La 1Àx B 6 increases considerably with Ce concentration and is nearly proportional to the number of Ce ions, whereas that of Pr x La 1Àx B 6 increases slightly with Pr concentration. In Ce x La 1Àx B 6 the effective mass depends very strongly on field and increases divergently with decreasing field, while that of Pr x La 1Àx B 6 increases slightly with decreasing field. The contribution to the dHvA signal from the conduction electrons of one spin direction diminishes with Ce concentration and appears to disappear somewhere around x ¼ 0:25 { 0:5. A weak spin dependence is also found in Pr x La 1Àx B 6 . The behaviors of Ce x La 1Àx B 6 and Pr x La 1Àx B 6 are compared to discuss the origin of the spin dependence of the Fermi surface properties.

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De Haas-van Alphen studies of rare earth compounds

Cited by 10 publications

References 5 publications

Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties

Evolution of Fermi Surface Properties in Ce_xLa_1-xB₆ and Pr_xLa_1-xB₆

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De Haas-van Alphen studies of rare earth compounds

Cited by 10 publications

References 5 publications

Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

Anisotropic electronic and magnetic properties of the quasi-two-dimensional heavy-fermion antiferromagnetCeRhIn5

Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties

Evolution of Fermi Surface Properties in CexLa1-xB6 and PrxLa1-xB6

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Evolution of Fermi Surface Properties in Ce_xLa_1-xB₆ and Pr_xLa_1-xB₆