Band structure and Fermi surface of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TmGa</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Pluzhnikov, V.; Czopnik, A.; Grechnev, G. E.; Savchenko, N. V.; Suski, W.

doi:10.1103/physrevb.59.7893

Cited by 15 publications

(30 citation statements)

References 17 publications

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“…This work represents an extension of our recent studies [1][2][3] of the FS and electronic structure in RGa 3 compounds at ambient pressure. Also, the pressure effect on the FS of ErGa 3 has been addressed in Ref.…”

Section: Introductionmentioning

confidence: 98%

“…The applied pressure modifies the magnitude and field dependence of the magnetization due to a pressure effect on the crystal field (CF) splitting, as well as on the exchange interaction [2,3]. It is known that the CF of metallic rare-earth compounds contains contributions from charges of surrounding ligands as well as from the direct Coulomb and exchange interactions of the R ion with conduction electrons.…”

Section: Methodsmentioning

confidence: 99%

“…7 in Ref. 2). The intersections of the calculated FS of LuGa 3 with faces of the cubic Brillouin zone (Fig.…”

Section: Details Of Calculationsmentioning

confidence: 99%

“…The results of ab initio calculations (see, e.g., Refs. [2,3,[18][19][20][21]) together with a wealth of experimental data (including bulk and FS properties) provide solid evidence that within the local spin-density approximation (LSDA) [22] a strict band treatment of the 4f states is inadequate for heavy rare earths. The f shell is not filled, and the 4f bands, which act as a sink for electrons, would always cut the Fermi level E F leading to absurd values of the specific heat coefficients [19] and wrong 4f occupancies, close to the divalent (i.e., atomic) configuration [23].…”

Section: Details Of Calculationsmentioning

confidence: 99%

“…In the recent years the de Haas-van Alphen effect (dHvA) has been extensively studied in a number of RM 3 compounds (R is a rare-earth, M is a p element from the group-III series), including RGa 3 [1][2][3][4], light RIn 3 (R = La -Gd) [5], heavy RIn 3 (R = TbLu) [6], TmAl 3 [7], and CeIn 3 [8]. The main objective of these studies was to determine the Fermi surface (FS) geometry and effective cyclotron masses in the representative series of RM 3 compounds.…”

Section: Introductionmentioning

confidence: 99%

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Pressure effect on the Fermi surface and electronic structure of LuGa3 and TmGa3

Pluzhnikov

Grechnev

Czopnik

et al. 2005

Low Temperature Physics

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The Fermi surfaces and cyclotron masses of LuGa 3 and TmGa 3 compounds are studied by means of the de Haas-van Alphen effect technique under pressure. The highly anisotropic pressure dependences of the de Haas-van Alphen frequencies and cyclotron masses have been observed in both compounds. Concurrently, the ab initio calculations of the volume-dependent band structures have been carried out for these compounds, including ferromagnetic configuration phase of TmGa 3 , by employing a relativistic version of the full-potential linear muffin-tin orbital method within the local spin-density approximation. The experimental data have been analysed on the basis of the calculated volume-dependent band structures and compared with the corresponding pressure effects in the isostructural compound ErGa 3 .

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Section: Introductionmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

“…7 in Ref. 2). The intersections of the calculated FS of LuGa 3 with faces of the cubic Brillouin zone (Fig.…”

Section: Details Of Calculationsmentioning

confidence: 99%

Section: Details Of Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pressure effect on the Fermi surface and electronic structure of LuGa3 and TmGa3

Pluzhnikov

Grechnev

Czopnik

et al. 2005

Low Temperature Physics

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Electronic interaction effects in rare‐earth alloys from 2D‐ACAR experiments

Biasini

Rusz

2007

Phys. Status Solidi (c)

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Measurement of the two dimensional angular correlation of the electron-positron annihilation radiation (2D-ACAR) complemented with ab-initio calculations can provide decisive information about the character of the f-electrons in rare earth compounds and are the prerequisite to the study of electron correlations. We provide examples of systems where good approximations of the archetype f-electron localized and f-electron itinerant behaviours, apply. i) In the case of the antiferromagnetic heavy fermion and superconductor CeIn3 the multisheet Fermi Surface (FS), reconstructed from our measurements in the paramagnetic phase, agrees closely with the predictions of band structure calculations regarding the Ce 4f electrons as fully localized. ii) On the other hand, our studies of the antiferromagnet actinide based UGa3 in the paramagnetic phase, compared with calculations which include the effects due to the non uniform positron density and the electron-positron correlations, produce a substantial evidence that an unconstrained 5f-electron itinerant description applies.1 Introduction The degree of localization of the f electrons is closely related to the unusual thermodynamic properties displayed by heavy fermions and, in general, to the variety of magnetic structures shown by rare earth based compounds. In a band view description of the electronic states, localization can be addressed as an increase of the time spent by one electron in proximity of the ionic centers, thus making energetically unfavorable the presence of another electron in the surrounding. Therefore, the experimental study of the f electrons localization is the first approach to the treatment of correlation effects in rare earths.For several 4f based systems the interpretation of experiments aimed at determining the Fermi surface and the magnetic properties was consistent with the hypothesis of the localization of the f electrons. However, in order to explain the thermodynamic and transport properties observed in some heavy fermion systems, it was proposed the appearance, at temperatures lower than the so called coherence temperature (somehow equivalent to the Kondo temperature in magnetic impurities), of very narrow bands. These bands, characterized by high f electron character, should be responsible of a high density of states at the Fermi level and account for the high value of the Sommerfeld coefficient (γ constant) and the cyclotron masses observed [1,2]. Since the energy scale of this novel state, denoted as Kondo lattice, is thousand times smaller than the Fermi energy, its effects are somehow precluded to the practical reach of ab initio codes based on density functional theory (DFT). Consequently, due to the lack of sufficient precision of self consistent and parameter free theories, the itinerancy or localization of the 4f electrons in heavy fermion systems is still a strongly debated argument [3].Concerning the character of 5f electrons in actinides, the general consensus assumes itinerancy in the low Z part of the period (Z ≤ 92) and local...

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