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  Localized 4f-electrons in the quantum critical heavy fermion ferromagnet CeRh6Ge4

Wang, A., Du, F., Zhang, Y., Graf, D., Shen, B., Chen, Y., et al. (2021). Localized 4f-electrons in the quantum critical heavy fermion ferromagnet CeRh6Ge4. Science Bulletin, 1-6. doi:10.1016/j.scib.2021.03.006.

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 Creators:
Wang, An1, Author
Du, Feng1, Author
Zhang, Yongjun1, Author
Graf, David1, Author
Shen, Bin1, Author
Chen, Ye1, Author
Liu, Yang1, Author
Smidman, Michael1, Author
Cao, Chao1, Author
Steglich, Frank2, Author              
Yuan, Huiqiu1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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Free keywords: Electronic structure, Ferromagnetism, Heavy fermions, Quantum phase transitions, Density functional theory, Ferromagnetism, Germanium alloys, Germanium compounds, Hydrostatic pressure, Phase transitions, 4f-electrons, Electronic.structure, Ferromagnetics, Ferromagnets, Heavy-fermion, Localised, Quantum critical, Quantum oscillations, Quantum-critical point, Quantum-phase transition, Electronic structure
 Abstract: Ferromagnetic quantum critical points were predicted to be prohibited in clean itinerant ferromagnetic systems, yet such a phenomenon was recently revealed in CeRh6Ge4, where the Curie temperature can be continuously suppressed to zero under a moderate hydrostatic pressure. Here we report the observation of quantum oscillations in CeRh6Ge4 from measurements using the cantilever and tunnel-diode oscillator methods in fields up to 45 T, clearly demonstrating that the ferromagnetic quantum criticality occurs in a clean system. In order to map the Fermi surface of CeRh6Ge4, we performed angle-dependent measurements of quantum oscillations at ambient pressure, and compared the results to density functional theory calculations. The results are consistent with the Ce 4f electrons remaining localized and not contributing to the Fermi surface, suggesting that localized ferromagnetism is a key factor for the occurrence of a ferromagnetic quantum critical point in CeRh6Ge4. © 2021 Science China Press

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Language(s): eng - English
 Dates: 2021-03-152021-03-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.scib.2021.03.006
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Title: Science Bulletin
  Abbreviation : Sci. Bull.
Source Genre: Journal
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Publ. Info: Elsevier B.V.
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 1 - 6 Identifier: ISSN: 2095-9273
CoNE: https://pure.mpg.de/cone/journals/resource/2095-9273