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Title: Bulk electronic structure of non-centrosymmetric EuTGe3 (T=Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy

Abstract

Non-centrosymmetric EuTGe3 ( T = Co, Ni, Rh, and Ir) possesses magnetic Eu2+ ions, and antiferromagnetic ordering appears at low temperatures. Transition-metal substitution leads to changes in the unit-cell volume and in the magnetic ordering. However, the magnetic ordering temperature does not scale with the volume change, and the Eu valence is expected to remain divalent. Here we study the bulk electronic structure of non-centrosymmetric Eu T Ge3 ( T = Co, Ni, Rh, and Ir) by hard x-ray photoelectron spectroscopy. The Eu 3d core-level spectrum confirms the robust Eu2+ valence state against the transition-metal substitution with a small contribution from Eu3+ . The estimated Eu mean valence is around 2.1 in these compounds, as confirmed by multiplet calculations. In contrast, the Ge 2p spectrum shifts to higher binding energy upon cha nging the transition metal from 3d to 4d to 5d elements, hinting at a change in the Ge- T bonding strength. The valence bands of the different compounds are found to be well reproduced by ab initio band structure calculations.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [6]
+ Show Author Affiliations
  1. Synchrotron SOLEIL, Gif sur Yvette (France)
  2. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  3. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Polish Academy of Sciences (PAS), Warsaw (Poland). Inst. of Low Temperature and Structure Research
  4. Polish Academy of Sciences (PAS), Warsaw (Poland). Inst. of Low Temperature and Structure Research
  5. Polish Academy of Sciences (PAS), Warsaw (Poland). Inst. of Low Temperature and Structure Research
  6. Synchrotron SOLEIL, Gif sur Yvette (France); Univ. Pierre et Marie Curie, Paris (France). Laboratoire de Chimie Physique-Matiere et Rayonnement
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1433664
Alternate Identifier(s):
OSTI ID: 1429575
Report Number(s):
IS-J-9618
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1802539
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 11; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Utsumi, Yuki, Kasinathan, Deepa, Swatek, Przemys?aw, Bednarchuk, Oleksandr, Kaczorowski, Dariusz, Ablett, James M., and Rueff, Jean-Pascal. Bulk electronic structure of non-centrosymmetric EuTGe3 (T=Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.115155.
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Utsumi, Yuki, Kasinathan, Deepa, Swatek, Przemys?aw, Bednarchuk, Oleksandr, Kaczorowski, Dariusz, Ablett, James M., & Rueff, Jean-Pascal. Bulk electronic structure of non-centrosymmetric EuTGe3 (T=Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy. United States. https://doi.org/10.1103/PhysRevB.97.115155
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Utsumi, Yuki, Kasinathan, Deepa, Swatek, Przemys?aw, Bednarchuk, Oleksandr, Kaczorowski, Dariusz, Ablett, James M., and Rueff, Jean-Pascal. Thu . "Bulk electronic structure of non-centrosymmetric EuTGe3 (T=Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy". United States. https://doi.org/10.1103/PhysRevB.97.115155. https://www.osti.gov/servlets/purl/1433664.
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@article{osti_1433664,
title = {Bulk electronic structure of non-centrosymmetric EuTGe3 (T=Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy},
author = {Utsumi, Yuki and Kasinathan, Deepa and Swatek, Przemys?aw and Bednarchuk, Oleksandr and Kaczorowski, Dariusz and Ablett, James M. and Rueff, Jean-Pascal},
abstractNote = {Non-centrosymmetric EuTGe3 ( T = Co, Ni, Rh, and Ir) possesses magnetic Eu2+ ions, and antiferromagnetic ordering appears at low temperatures. Transition-metal substitution leads to changes in the unit-cell volume and in the magnetic ordering. However, the magnetic ordering temperature does not scale with the volume change, and the Eu valence is expected to remain divalent. Here we study the bulk electronic structure of non-centrosymmetric Eu T Ge3 ( T = Co, Ni, Rh, and Ir) by hard x-ray photoelectron spectroscopy. The Eu 3d core-level spectrum confirms the robust Eu2+ valence state against the transition-metal substitution with a small contribution from Eu3+ . The estimated Eu mean valence is around 2.1 in these compounds, as confirmed by multiplet calculations. In contrast, the Ge 2p spectrum shifts to higher binding energy upon cha nging the transition metal from 3d to 4d to 5d elements, hinting at a change in the Ge- T bonding strength. The valence bands of the different compounds are found to be well reproduced by ab initio band structure calculations.},
doi = {10.1103/PhysRevB.97.115155},
journal = {Physical Review B},
number = 11,
volume = 97,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2018},
month = {Thu Mar 15 00:00:00 EDT 2018}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1103/PhysRevB.97.115155
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Cited by: 6 works
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Figures / Tables:

FIG. 1. FIG. 1.: (Color online). Eu 3$d$ core level spectra of EuTGe3 ($T$=Co, Ni, Rh and Ir). The experimental data are displayed using lled circles. The solid black lines represent the simulated spectra from atomic multiplet calculations with a 4$f$7 con guration including plasmon satellites and an integral background34. The arrowsmore » indicate the position of Eu3+ components. The simulated Eu2+ spectrum (dark blue line) and its plasmon satellites (light blue line) for EuCoGe3 are shown in the bottom of the figure as an example. The difference (purple line) spectrum obtained by subtracting the simulated spectrum from the experimental one reveals the Eu3+ components (purple area).« less
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    HAXPES for Materials Science at the GALAXIES Beamline
    journal, July 2018

    HAXPES for materials science at the GALAXIES beamline
    text, January 2018

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