Anomalous Electronic Correlations in the Ground State Momentum Density ofAl97Li3

Abstract

We report high resolution Compton scattering measurements on an Al(97)Li(3) disordered alloy single crystal for momentum transfer along the [100], [110], and [111] symmetry directions. The results are interpreted via corresponding Korringa-Kohn-Rostoker coherent potential approximation first-principles computations. By comparing spectra for Al(97)Li(3) and Al, we show that the momentum density in the alloy differs significantly from the predictions of the conventional Fermi-liquid picture and that the ground state of Al is modified anomalously by the addition of Li.

Electron momentum density and Compton profile by a semi-empirical approach

“…Here valence Compton profiles can be used for background subtraction. In addition, our method could explain some anomalies observed in Al 97 Li 3 alloys [59].…”

Extracting the Redox Orbitals in Li Battery Materials with High-Resolution X-Ray Compton Scattering Spectroscopy

“…In fact, x-ray Compton scattering has been used as a robust technique for investigating wave-function characters [2,28,29] and Fermi surfaces [30][31][32] in wide classes of materials. Compton scattering has also been applied to study charge transfers in metal alloys [33][34][35][36] and also in Li battery cathode materials [37]. Moreover, the determination of the Mulliken analysis has been very successful to explain the behavior of the Compton profile in Si clathrates [38].…”

An advanced pulse neutron source and scientific challenges at J-PARC

“…For studies of magnetic materials, information on spin states of electrons is important. During the years since 1976 [1], it has been found that magnetic Compton scattering of circularly polarized X-rays is effective for measuring MD distribution of electron spins in ferro/ferri-magnetic materials, such as metals, alloys and compounds, all of which are composed of 3d-transition and/or 4f-rare-earth elements [2]. Following an introduction to characteristic features of magnetic Compton scattering, recent progress will be briefly reviewed by referring to notable reports.…”