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Title: Unraveling 5f-6d hybridization in uranium compounds via spin-resolved L-edge spectroscopy

Abstract

Here, the multifaceted character of 5f electrons in actinide materials, from localized to itinerant and in between, together with their complex interactions with 6d and other conduction electron states, has thwarted efforts for fully understanding this class of compounds. While theoretical efforts abound, direct experimental probes of relevant electronic states and their hybridization are limited. Here we exploit the presence of sizable quadrupolar and dipolar contributions in the uranium L 3-edge X-ray absorption cross section to provide unique information on the extent of spin-polarized hybridization between 5f and 6d electronic states by means of X-ray magnetic circular dichroism. As a result, we show how this 5f-6d hybridization regulates the magnetism of each sublattice in UCu 2Si 2 and UMn 2Si 2 compounds, demonstrating the potentiality of this methodology to investigate a plethora of magnetic actinide compounds.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [3];  [6]
  1. Brazilian Synchrotron Light Lab. (LNLS), Campinas, SP (Brazil); Univ. Estadual de Campinas (UNICAMP), Campinas, SP (Brazil)
  2. Brazilian Synchrotron Light Lab. (LNLS), Campinas, SP (Brazil)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. Grenoble Alpes, Grenoble (France); CNRS, Grenoble (France)
  5. Univ. Estadual de Campinas (UNICAMP), Campinas, SP (Brazil)
  6. Brazilian Synchrotron Light Lab. (LNLS), Campinas, SP (Brazil); Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Brazilian Ministry of Science, Technology and Innovation (MCTI); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1461351
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

dos Reis, R. D., Veiga, L. S. I., Escanhoela, Jr., C. A., Lang, J. C., Joly, Y., Gandra, F. G., Haskel, D., and Souza-Neto, N. M. Unraveling 5f-6d hybridization in uranium compounds via spin-resolved L-edge spectroscopy. United States: N. p., 2017. Web. doi:10.1038/s41467-017-01524-1.
dos Reis, R. D., Veiga, L. S. I., Escanhoela, Jr., C. A., Lang, J. C., Joly, Y., Gandra, F. G., Haskel, D., & Souza-Neto, N. M. Unraveling 5f-6d hybridization in uranium compounds via spin-resolved L-edge spectroscopy. United States. doi:10.1038/s41467-017-01524-1.
dos Reis, R. D., Veiga, L. S. I., Escanhoela, Jr., C. A., Lang, J. C., Joly, Y., Gandra, F. G., Haskel, D., and Souza-Neto, N. M. Tue . "Unraveling 5f-6d hybridization in uranium compounds via spin-resolved L-edge spectroscopy". United States. doi:10.1038/s41467-017-01524-1. https://www.osti.gov/servlets/purl/1461351.
@article{osti_1461351,
title = {Unraveling 5f-6d hybridization in uranium compounds via spin-resolved L-edge spectroscopy},
author = {dos Reis, R. D. and Veiga, L. S. I. and Escanhoela, Jr., C. A. and Lang, J. C. and Joly, Y. and Gandra, F. G. and Haskel, D. and Souza-Neto, N. M.},
abstractNote = {Here, the multifaceted character of 5f electrons in actinide materials, from localized to itinerant and in between, together with their complex interactions with 6d and other conduction electron states, has thwarted efforts for fully understanding this class of compounds. While theoretical efforts abound, direct experimental probes of relevant electronic states and their hybridization are limited. Here we exploit the presence of sizable quadrupolar and dipolar contributions in the uranium L3-edge X-ray absorption cross section to provide unique information on the extent of spin-polarized hybridization between 5f and 6d electronic states by means of X-ray magnetic circular dichroism. As a result, we show how this 5f-6d hybridization regulates the magnetism of each sublattice in UCu2Si2 and UMn2Si2 compounds, demonstrating the potentiality of this methodology to investigate a plethora of magnetic actinide compounds.},
doi = {10.1038/s41467-017-01524-1},
journal = {Nature Communications},
number = 1,
volume = 8,
place = {United States},
year = {2017},
month = {10}
}

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Cited by: 5 works
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