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  Orientation of the ground-state orbital in CeCoIn5 and CeRhIn5

Sundermann, M., Amorese, A., Strigari, F., Leedahl, B., Tjeng, L. H., Haverkort, M. W., et al. (2019). Orientation of the ground-state orbital in CeCoIn5 and CeRhIn5. Physical Review B, 99(23): 235143, pp. 1-6. doi:10.1103/PhysRevB.99.235143.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-8211-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8218-E
Genre: Journal Article

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 Creators:
Sundermann, M.1, Author              
Amorese, A.1, Author              
Strigari, F.2, Author
Leedahl, B.1, Author              
Tjeng, L. H.3, Author              
Haverkort, M. W.2, Author
Gretarsson, H.1, Author              
Yavaş, H.1, Author              
Sala, M. Moretti2, Author
Bauer, E. D.2, Author
Rosa, P. F. S.2, Author
Thompson, J. D.2, Author
Severing, A.1, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2External Organizations, ou_persistent22              
3Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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 Abstract: We present core level nonresonant inelastic x-ray scattering (NIXS) data of the heavy-fermion compounds CeCoIn5 and CeRhIn5 measured at the Ce N-4,N-5 edges. The higher than dipole transitions in NIXS allow determining the orientation of the Gamma(7) crystal-field ground-state orbital within the unit cell. The crystal-field parameters of the CeMIn5 compounds and related substitution phase diagrams have been investigated in great detail in the past; however, whether the ground-state wave function is the Gamma(+)(7) ((x2) - y(2)) or Gamma(-)(7) (xy orientation) remained undetermined. We show that the Gamma(-)(7) doublet with lobes along the (110) direction forms the ground state in CeCoIn5 and CeRhIn5. For CeCoIn5, however, we find also some contribution of the first excited state crystal-field state in the ground state due to the stronger hybridization of 4 f and conduction electrons, suggesting a smaller alpha(2) value than originally anticipated from x-ray absorption. A comparison is made to the results of existing density functional theory plus dynamical mean-field theory calculations.

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Language(s): eng - English
 Dates: 2019-06-212019-06-21
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.99.235143
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 99 (23) Sequence Number: 235143 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008