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@ARTICLE{Marino:588614,
author = {Marino, Andrea and Sundermann, Martin and Christovam,
Denise Sacramento and Amorese, Andrea and Chang, Chun-Fu and
Dolmantas, Paulius and Said, Ayman H. and Gretarsson, Hlynur
and Keimer, Bernhard and Haverkort, Maurits W. and Andreev,
Alexander V. and Havela, Ladislav and Thalmeier, Peter and
Tjeng, Liu Hao and Severing, Andrea},
title = {{S}inglet magnetism in intermetallic ${UG}a_2$ unveiled by
inelastic x-ray scattering},
journal = {Physical review / B},
volume = {108},
number = {4},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {PUBDB-2023-04840},
pages = {045142},
year = {2023},
abstract = {Using high resolution tender x-ray resonant inelastic
scattering and hard x-ray nonresonant inelastic scattering
beyond the dipole limit we were able to detect electronic
excitations in intermetallic UGa$_2$ that are highly atomic
in nature. Analysis of the spectral lineshape reveals that
the local 5f$^2$ configuration characterizes the correlated
nature of this ferromagnet. The orientation and directional
dependence of the spectra indicate that the ground state is
made of the $Γ_1$ singlet and/or $Γ_6$ doublet symmetry.
With the ordered moment in the ab plane, we infer that the
magnetism originates from the higher lying $Γ_6$ doublet
being mixed with the $Γ_1$ singlet due to intersite
exchange, qualifying UGa$_2$ to be a true quantum magnet.
The ability to observe atomic excitations is crucial to
resolve the ongoing debate about the degree of localization
versus itineracy in U intermetallics.},
cin = {DOOR ; HAS-User / FS-PETRA-S},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731 /
I:(DE-H253)FS-PETRA-S-20210408},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
DFG project 387555779 - Von versteckter bis
antiferromagnetischer Ordnung mit großem Moment in URu2Si2:
eine Röntgenstrahluntersuchung der 5f Besetzung und
Wellenfunktionssymmetrie. (387555779)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
G:(GEPRIS)387555779},
experiment = {EXP:(DE-H253)P-P01-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001103167400001},
doi = {10.1103/PhysRevB.108.045142},
url = {https://bib-pubdb1.desy.de/record/588614},
}