Amorese, Andrea, Sundermann, Martin, Leedahl, Brett, Marino, Andrea, Takegami, Daisuke ORCID: 0000-0003-3832-1849, Gretarsson, Hlynur, Gloskovskii, Andrei, Schlueter, Christoph, Haverkort, Maurits W. ORCID: 0000-0002-7216-3146, Huang, Yingkai, Szlawska, Maria, Kaczorowski, Dariusz, Ran, Sheng, Maple, M. Brian, Bauer, Eric D., Leithe-Jasper, Andreas, Hansmann, Philipp, Thalmeier, Peter, Tjeng, Liu Hao and Severing, Andrea ORCID: 0000-0002-9547-2742 (2020). From antiferromagnetic and hidden order to Pauli paramagnetism in UM2Si2 compounds with 5f electron duality. Proc. Natl. Acad. Sci. U. S. A., 117 (48). S. 30220 - 30228. WASHINGTON: NATL ACAD SCIENCES. ISSN 0027-8424

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Abstract

Using inelastic X-ray scattering beyond the dipole limit and hard X-ray photoelectron spectroscopy we establish the dual nature of the U 5f electrons in UM2Si2 (M = Pd, Ni, Ru, Fe), regardless of their degree of delocalization. We have observed that the compounds have in common a local atomic-like state that is well described by the U 5f(2) configuration with the Gamma((1))(1) and Gamma(2) quasi-doublet symmetry. The amount of the U 5f(3) configuration, however, varies considerably across the UM2Si2 series, indicating an increase of U 5f itineracy in going from M = Pd to Ni to Ru and to the Fe compound. The identified electronic states explain the formation of the very large ordered magnetic moments in UPd2Si2 and UNi2Si2, the availability of orbital degrees of freedom needed for the hidden order in URu2Si2 to occur, as well as the appearance of Pauli paramagnetism in UFe2Si2. A unified and systematic picture of the UM2Si2 compounds may now be drawn, thereby providing suggestions for additional experiments to induce hidden order and/or superconductivity in U compounds with the tetragonal body-centered ThCr2Si2 structure.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Amorese, AndreaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sundermann, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leedahl, BrettUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marino, AndreaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Takegami, DaisukeUNSPECIFIEDorcid.org/0000-0003-3832-1849UNSPECIFIED
Gretarsson, HlynurUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gloskovskii, AndreiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schlueter, ChristophUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haverkort, Maurits W.UNSPECIFIEDorcid.org/0000-0002-7216-3146UNSPECIFIED
Huang, YingkaiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Szlawska, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaczorowski, DariuszUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ran, ShengUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Maple, M. BrianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bauer, Eric D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leithe-Jasper, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hansmann, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thalmeier, PeterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tjeng, Liu HaoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Severing, AndreaUNSPECIFIEDorcid.org/0000-0002-9547-2742UNSPECIFIED
URN: urn:nbn:de:hbz:38-310103
DOI: 10.1073/pnas.2005701117
Journal or Publication Title: Proc. Natl. Acad. Sci. U. S. A.
Volume: 117
Number: 48
Page Range: S. 30220 - 30228
Date: 2020
Publisher: NATL ACAD SCIENCES
Place of Publication: WASHINGTON
ISSN: 0027-8424
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
MAGNETIC EXCITATIONS; TERNARY COMPOUNDS; FERMI-SURFACE; SUPERCONDUCTIVITY; DIFFRACTION; PHASE; PHOTOEMISSION; TRANSITION; SCATTERING; BEHAVIORMultiple languages
Multidisciplinary SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/31010

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