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- W2045581795 abstract "The two-photon momentum distribution for positron annihilation is computed for the heavy-fermion system ${mathrm{URu}}_{2}$${mathrm{Si}}_{2}$. A nonrelativistic approximation of the positron-electron overlap integrals is applied to wave functions obtained from a fully relativistic, self-consistent band-structure calculation. The crystal structure causes a preference of the positron for the uranium site, resulting in a considerable contribution to the two-photon momentum distribution of the f-electron states and marked structure related to the Fermi surface. Results are presented for integration of the two-photon momentum distribution along the [001] and [101] directions. Subsequent application of the Lock-Crisp-West theorem reveals Fermi-surface effects superimposed on long-wavelength structure due to the inhomogeneity of the positron wave function. It is concluded that positron annihilation can be used to study the nature of the f electrons in this heavy-fermion system." @default.
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- W2045581795 date "1991-04-15" @default.
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- W2045581795 title "Probing thefelectrons inURu2Si2with positrons: A theoretical investigation" @default.
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- W2045581795 doi "https://doi.org/10.1103/physrevb.43.9515" @default.
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