Sundermann, Martin, Haverkort, Maurits W. ORCID: 0000-0002-7216-3146, Agrestini, Stefano ORCID: 0000-0002-3625-880X, Al-Zein, Ali, Sala, Marco Moretti ORCID: 0000-0002-9744-9976, Huang, Yingkai, Golden, Mark, de Visser, Anne, Thalmeier, Peter, Tjeng, Liu Hao ORCID: 0000-0002-0595-9312 and Severing, Andrea ORCID: 0000-0002-9547-2742 (2016). Direct bulk-sensitive probe of 5f symmetry in URu2Si2. Proc. Natl. Acad. Sci. U. S. A., 113 (49). S. 13989 - 13995. WASHINGTON: NATL ACAD SCIENCES. ISSN 0027-8424

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Abstract

The second-order phase transition into a hidden order phase in URu2Si2 goes along with an order parameter that is still a mystery, despite 30 years of research. However, it is understood that the symmetry of the order parameter must be related to the symmetry of the low-lying local electronic f-states. Here, we present results of a spectroscopic technique, namely core-level nonresonant inelastic X-ray scattering (NIXS). This method allows for the measurement of local high-multipole excitations and is bulk-sensitive. The observed anisotropy of the scattering function unambiguously shows that the 5f ground-state wave function is composed mainly of the Gamma(1) with majority J(z) = |4 > + |4 > and/or Gamma(2) singlet states. The incomplete dichroism indicates the possibility that quantum states of other irreducible representation are mixed into the ground state.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Sundermann, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haverkort, Maurits W.UNSPECIFIEDorcid.org/0000-0002-7216-3146UNSPECIFIED
Agrestini, StefanoUNSPECIFIEDorcid.org/0000-0002-3625-880XUNSPECIFIED
Al-Zein, AliUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sala, Marco MorettiUNSPECIFIEDorcid.org/0000-0002-9744-9976UNSPECIFIED
Huang, YingkaiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Golden, MarkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Visser, AnneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thalmeier, PeterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tjeng, Liu HaoUNSPECIFIEDorcid.org/0000-0002-0595-9312UNSPECIFIED
Severing, AndreaUNSPECIFIEDorcid.org/0000-0002-9547-2742UNSPECIFIED
URN: urn:nbn:de:hbz:38-252735
DOI: 10.1073/pnas.1612791113
Journal or Publication Title: Proc. Natl. Acad. Sci. U. S. A.
Volume: 113
Number: 49
Page Range: S. 13989 - 13995
Date: 2016
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
HIDDEN-ORDER TRANSITION; MAGNETIC EXCITATIONS; FERMI-SURFACE; LATTICE; SYSTEM; BREAKING; PHASE; SUPERCONDUCTIVITY; ENTROPYMultiple languages
Multidisciplinary SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25273

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