Three-dimensional reconstruction of the Fermi surface of LaB6

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dc.creatorMonge, M.
dc.creatorBiasini, M.
dc.creatorKontrym-Sznajd, G.
dc.creatorSato, N.
dc.date2002-09-09
dc.date.accessioned2026-07-07T02:47:12Z
dc.date.available2026-07-07T02:47:12Z
dc.descriptionThe 2-dimensional angular correlations of the positron annihilation radiation (2D-ACAR) on a single crystal of LaB6 was measured for three projections. The 2D-ACAR spectra were subjected to the Van Citter-Gerhard deconvolution alghorithm. From the experimental spectra we produced the 3D k-space density rho(k) via three different methods: i) we reconstructed the 3D electron-positron momentum density rho(p) via the Cormack method. rho(k) was then obtained by applying the 3D LCW transformation to rho(p). ii) The same steps of point i) were repeated adopting a modified Fourier-transform-based algorithm. iii) The 3d k-space occupancy rho(k) was obtained directly by parameterising the Fermi surface volume with prolate ellipsoids whose axes were determined by a least-square fit to the 2D LCW transformations applied to two high symmetry projections. The ellipsoids diameters along high symmetry directions of the cubic Brillouin zone (BZ), as a fraction of the BZ size, were 0.64 (dir. X-M) and 0.82 (dir. Gamma-X). The resulting Fermi volume, as a fraction of the BZ volume, was 0.55. These results agree within 1% with those obtained via the de Haas van Alphen experiments.
dc.identifierhttps://arxiv.org/abs/cond-mat/0209207
dc.identifierhttp://arxiv.org/abs/cond-mat/0209207
dc.identifierMat. Sci. Forum 363-365, 582-584 (2001)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19921
dc.subjectMaterials Science
dc.titleThree-dimensional reconstruction of the Fermi surface of LaB6
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