Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F16%3A43929040" target="_blank" >RIV/49777513:23640/16:43929040 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/srep20898" target="_blank" >http://dx.doi.org/10.1038/srep20898</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/srep20898" target="_blank" >10.1038/srep20898</a>

Result language
angličtina
Original language name
Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation
Original language description
We employ a positron annihilation technique, the spin-polarized two-dimensional angular correlation of annihilation radiation (2D-ACAR), to measure the spin-difference spectra of ferromagnetic nickel. The experimental data are compared with the theoretical results obtained within a combination of the local spin density approximation (LSDA) and the many-body dynamical mean-field theory (DMFT). We find that the self-energy defining the electronic correlations in Ni leads to anisotropic contributions to the momentum distribution. By direct comparison of the theoretical and experimental results we determine the strength of the local electronic interaction U in ferromagnetic Ni as 2.0 +- 0.1 eV.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/ED2.1.00%2F03.0088" target="_blank" >ED2.1.00/03.0088: Centre of the New Technologies and Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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