The Fermi surface of ErGa<sub>3</sub>

Pluzhnikov, V.; Czopnik, A.; Grechnev, G. E.

doi:10.1088/0953-8984/11/23/305

Cited by 14 publications

(51 citation statements)

References 20 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: 59%

“…It can be expected that at low temperatures TmGa 3 reveals large and field-dependent magnetization, in the same manner as is the case of ErGa 3 [3,4]. It brings about, as in the case of ErGa 3 [4], a number of difficulties in the Fourier analysis of dHvA oscillations.…”

Section: Introductionmentioning

confidence: 89%

“…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%

“…In the present work we study the effect of pressure on the FS and cyclotron masses of the LuGa 3 and TmGa 3 compounds by means of the dHvA effect. The pressure derivatives of dHvA frequencies and cyclotron masses are of particular interest due to their sensitivity to details of the exchange interaction and many-body effects in R systems.…”

Section: Introductionmentioning

confidence: 99%

“…4. Information on physical properties of TmGa 3 and LuGa 3 is scarce. These compounds crystallize in the AuCu 3 -type cubic structure.…”

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: 59%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…4. Information on physical properties of TmGa 3 and LuGa 3 is scarce. These compounds crystallize in the AuCu 3 -type cubic structure.…”

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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Fermi surface of ErGa₃

Kontrym‐Sznajd

Samsel‐Czekała

Grechnev

et al. 2007

Phys. Status Solidi (c)

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The Fermi surface (FS) in paramagnetic ErGa 3 is estimated by various band structure methods: linear muffin-tin orbital (LMTO) in the atomic sphere approximation (ASA) and three new codes contained full potential (FP) instead of ASA, namely FP-LMTO, FP linear augmented plane wave (FLAPW), and FP local orbitals (FPLO) methods. Three dimensional (3D) electron-positron (e-p) momentum densities ρ(p) are reconstructed from two dimensional (2D) angular correlation of annihilation radiation (ACAR) spectra measured for paramagnetic ErGa 3 . Reconstructed densities in the extended p-space, folded into the reduced k-space, are compared with the theoretical results. Unfortunately, none of these modern FP codes is able to give satisfying description of the experimental data that are in perfect agreement with previous LMTO-ASA results.The rare-earth (RE) compounds constitute an interesting subject of investigations due to their magnetic properties [1]. Lanthanides model assumes that the magnetic coupling between the 4f electrons is carried out indirectly via polarization of conducting electrons, according to the RudermanKittel-Kasuya-Yosida (RKKY) theory [2] and that magnetic properties are controlled by the FS topology (so-called nesting -flat FS sheets) [3]. The first direct observation of such an FS feature was possible thanks to the study of 2D ACAR spectra [4][5][6][7][8][9][10]. In this unique technique one measures line projections of the e-p pairs in the extended momentum space ρ(p). From such spectra for different directions of projections one can reconstruct ρ(p) in 3D momentum space applying tomography techniques [11]. Next, using the LCW folding [12], i.e., a conversion from the extended p into reduced k space, one may reproduce the FS.In the case of ErGa 3 2D-ACAR experiment was carried out in the paramagnetic state at temperature of 60 K and in the magnetic field 1.8 T (for more details see [9]). Four projections were measured and next deconvoluted employing the Van Citter-Gerhardt algorithm [13]. The e-p momentum densities ρ(p) were reconstructed by Cormack's method (CM) [14] and the lattice harmonics expansion (LHE) algorithm [15]. Finally, the 3D-LCW transformation [12] was applied to get ρ(k) (occupation numbers "seen" by positrons). These results were compared with band structure calculations performed via four different methods: LMTO-ASA [16]

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