Evidence for possible 4<i>f</i>bands at<i>T</i>≫<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">T</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">K</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>in the heavy-fermion single crystal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CePt</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml

Ab, Andrews; Joyce, J. J.; Arko, A. J.; Jd, Thompson; Tang, Jinke; Lawrence, JM; Jc, Hemminger

doi:10.1103/physrevb.51.3277

Cited by 80 publications

(48 citation statements)

References 13 publications

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“…In the light of PAM, BE and intensity variations of these features as a function of electron wave vector k are expected being particularly strong for the Fermi-level peak. In fact, in a few cases energy dispersions [6,7,8,9,10,11] and k-dependent intensity variations [6,10,12] were reported and qualitatively interpreted in the light of PAM. A quantitative description of the phenomena in relation to the VB structure however is still lacking.…”

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confidence: 99%

Wave-vector dependent intensity variations of the Kondo peak in photoemission fromCePd3

et al. 2005

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Strong angle-dependent intensity variations of the Fermi-level feature are observed in 4d → 4f resonant photoemission spectra of CePd3 (111), that reveal the periodicity of the lattice and largest intensity close to the Γ points of the surface Brillouin zone. In the framework of a simplified periodic Anderson model the phenomena may quantitatively be described by a wave-vector dependence of the electron hopping matrix elements caused by Fermi-level crossings of non-4f -derived energy bands.PACS numbers: 71.20.Eh, 71.27.+a In Ce compounds, interaction of localized 4f states with itinerant valence-band (VB) states may lead to a number of fascinating phenomena ranging from valence instabilities to heavy-fermion and even non-Fermi-liquid behavior [1]. Although part of physical properties of these compounds may be understood in the framework of local-density approximation (LDA) band-structure calculations, the latter are not able to account properly for the correlated nature of the f electrons. For the latter, localized approaches are applied based on the Kondo or Anderson hamiltonians. Particularly application of the single-impurity Anderson model (SIAM) [2] was very successful allowing a quantitative correlation of transport, thermodynamic and magnetic properties of the materials with spectroscopic data (see, for example, Ref. 3). A shortcoming of this model, however, is its restriction to an isolated f impurity that ignores the influence of the periodicity of the lattice on the f state. Anisotropies of physical properties, therefore, are usually only discussed in terms of crystal field effects, while a k dependence of hybridization is not considered [4]. Taking into account the latter leads to the periodic Anderson model (PAM) for which, however, realistic approaches are presently still missing [5].Experimentally, in particular angle-resolved photoemission (PE) has been used to search for inconsistencies of SIAM that make use of PAM necessary. In PE spectra, the Ce 4f emissions reveal a characteristic double peak structure consisting of a spin-orbit split Fermi-level (E F ) feature related to the Kondo resonance and a broad peak at about 2 eV binding energy (BE) that corresponds roughly to the 4f 0 final state expected for photoionization of a 4f 1 ground state. In the light of PAM, BE and intensity variations of these features as a function of electron wave vector k are expected being particularly strong for the Fermi-level peak. In fact, in a few cases energy dispersions [6,7,8,9,10,11] and k-dependent intensity variations [6,10,12] were reported and qualitatively interpreted in the light of PAM. A quantitative description of the phenomena in relation to the VB structure however is still lacking.In the present Letter we report on an angle-resolved 4d → 4f resonant PE study of CePd 3 (111). This compound is characterized by a relatively low VB density of states around the Fermi energy [13] and band crossings of the Fermi level may only be observed by photoemission at certain points in k space. CePd 3 (111) re...

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Wave-vector dependent intensity variations of the Kondo peak in photoemission fromCePd3

et al. 2005

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“…URu Si is a nominally 5f F 2 2 [15,16] and claims of ''band-like'' dispersion of system with a moderately large linear specific heat 2 f-states [17,18]. However, because of technical barcoefficient of g 5180 mJ / mol-K extrapolated from riers, ARPES has never provided enough FS detail in the paramagnetic phase [24,25].…”

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Comparative study of the electronic structure of XRu2Si2: probing the Anderson lattice

Denlinger

Gweon

Allen

et al. 2001

Journal of Electron Spectroscopy and Related Phenomena

130

141

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“…However, there is evidence that this general belief has to be modifi ed. For instance, in the cases of cerium (uranium) compounds [12][13][14][15][16], 4f (5f) level dispersion was observed experimentally, suggesting smaller f level localization in these systems. The unoccupied f states certainly will adopt all the trappings of band structure in every conventional sense.…”

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confidence: 99%

Electronic, Magnetic and Transport Properties of Rare‐Earth Monopnictides

Duan¹,

Sabirianov²,

Mei³

et al. 2007

ChemInform

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The electronic structures and magnetic properties of many rare-earth monopnictides are reviewed in this article. Possible candidate materials for spintronics devices from the rare-earth monopnictide family, i.e. high polarization (nominally half-metallic) ferromagnets and antiferromagnets, are identifi ed. We attempt to provide a unifi ed picture of the electronic properties of these strongly correlated systems. The relative merits of several ab initio theoretical methods, useful in the study of the rare-earth monopnictides, are discussed. We present our current understanding of the possible half-metallicity, semiconductor-metal transitions, and magnetic orderings in the rare-earth monopnictides. Finally, we propose some potential strategies to improve the magnetic and electronic properties of these candidate materials for spintronics devices.

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Evidence for possible 4fbands atT≫TKin the heavy-fermion single crystalCePt2

Cited by 80 publications

References 13 publications

Wave-vector dependent intensity variations of the Kondo peak in photoemission fromCePd3

Wave-vector dependent intensity variations of the Kondo peak in photoemission fromCePd3

Comparative study of the electronic structure of XRu2Si2: probing the Anderson lattice

Electronic, Magnetic and Transport Properties of Rare‐Earth Monopnictides

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