by Sundermann, Martin, Haverkort, Maurits W., Agrestini, Stefano and Al-Zein, Ali, Sala, Marco Moretti, Huang, Yingkai, Golden, Mark, de Visser, Anne, Thalmeier, Peter and Tjeng, Liu Hao and Severing, Andrea
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.
Reference:
Direct bulk-sensitive probe of 5f symmetry in URu2Si2 (Sundermann, Martin, Haverkort, Maurits W., Agrestini, Stefano and Al-Zein, Ali, Sala, Marco Moretti, Huang, Yingkai, Golden, Mark, de Visser, Anne, Thalmeier, Peter and Tjeng, Liu Hao and Severing, Andrea), In PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, NATL ACAD SCIENCES, volume 113, 2016.
Bibtex Entry:
@article{ ISI:000389536700030,
Author = {Sundermann, Martin and Haverkort, Maurits W. and Agrestini, Stefano and
Al-Zein, Ali and Sala, Marco Moretti and Huang, Yingkai and Golden, Mark
and de Visser, Anne and Thalmeier, Peter and Tjeng, Liu Hao and
Severing, Andrea},
Title = {{Direct bulk-sensitive probe of 5f symmetry in URu2Si2}},
Journal = {{PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA}},
Year = {{2016}},
Volume = {{113}},
Number = {{49}},
Pages = {{13989-13994}},
Month = {{DEC 6}},
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.}},
Publisher = {{NATL ACAD SCIENCES}},
Address = {{2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Severing, A (Corresponding Author), Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
Sundermann, Martin; Severing, Andrea, Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
Haverkort, Maurits W.; Agrestini, Stefano; Thalmeier, Peter; Tjeng, Liu Hao, Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
Al-Zein, Ali; Sala, Marco Moretti, European Synchrotron Radiat Facil, F-38043 Grenoble, France.
Huang, Yingkai; Golden, Mark; de Visser, Anne, Univ Amsterdam, Van der Waals Zeeman Inst, NL-1098 XH Amsterdam, Netherlands.
Haverkort, Maurits W., Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany.
Al-Zein, Ali, Beirut Arab Univ, Dept Phys, Fac Sci, Beirut 11072809, Lebanon.}},
DOI = {{10.1073/pnas.1612791113}},
ISSN = {{0027-8424}},
Keywords = {{strongly correlated electron systems; X-ray spectroscopy;
crystal-electric field; heavy fermions; hidden order}},
Keywords-Plus = {{HIDDEN-ORDER TRANSITION; MAGNETIC EXCITATIONS; FERMI-SURFACE; LATTICE;
SYSTEM; BREAKING; PHASE; SUPERCONDUCTIVITY; ENTROPY}},
Research-Areas = {{Science & Technology - Other Topics}},
Web-of-Science-Categories = {{Multidisciplinary Sciences}},
Author-Email = {{severing@ph2.uni-koeln.de}},
ResearcherID-Numbers = {{Golden, Mark S/D-3469-2011
Haverkort, Maurits W./D-2319-2009
Tjeng, Liu Hao/B-8607-2019
Moretti, Marco/AAF-9255-2019
Sala, Marco Moretti/H-1034-2014
Zein, Ali Al/F-4393-2019
}},
ORCID-Numbers = {{Haverkort, Maurits W./0000-0002-7216-3146
Tjeng, Liu Hao/0000-0002-0595-9312
Moretti, Marco/0000-0002-9744-9976
Sala, Marco Moretti/0000-0002-9744-9976
Agrestini, Stefano/0000-0002-3625-880X}},
Funding-Acknowledgement = {{Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) {[}SE
1441/1-2]}},
Funding-Text = {{We thank Artem Nikitin for characterizing the sample by transport. M.S.
and A.S. received support from Deutsche Forschungsgemeinschaft Project
SE 1441/1-2. We further acknowledge European Synchrotron Radiation
Facility (ESRF) for provision of synchrotron radiation facilities
(Proposals HC1533 and HC2252).}},
Number-of-Cited-References = {{57}},
Times-Cited = {{14}},
Usage-Count-Last-180-days = {{2}},
Usage-Count-Since-2013 = {{45}},
Journal-ISO = {{Proc. Natl. Acad. Sci. U. S. A.}},
Doc-Delivery-Number = {{EE3XX}},
Unique-ID = {{ISI:000389536700030}},
OA = {{Bronze, Green Published}},
DA = {{2020-12-22}},
}
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