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PreprintCC BY 4.0arXiv

Field-tuned quasiparticles and electronic structure in heavy-fermion YbNi4P2

  • Will Broad
  • Owen Moulding
  • Takaki Muramatsu
  • Manuel Brando
  • Alix McCollam
  • Femke Bangman
  • Gertrud Zwicknagl
  • Kristin Kliemt
  • Cornelius Krellner
  • Sven Friedemann
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Abstract

We study the Fermi surface topology and quasiparticle properties in the heavy fermion compound YbNi4P2 at high magnetic fields using quantum oscillation measurements. We observe a large decrease of the quasiparticle mass with increasing field and demonstrate good qualitative agreement with the single-ion Kondo model. At the putative Lifshitz transition at 17 T, we observe a sudden change of quantum oscillation frequencies suggesting an abrupt change of the electronic structure and/or quasiparticle characteristics. Our results demonstrate the ability to tune the electronic structure and provide input for theoretical models of YbNi4P2 and correlated electron systems in high magnetic fields.

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Cite

BibTeXRIS
BibTeX
@misc{broad2026fieldtuned,
  title = {{Field-tuned quasiparticles and electronic structure in heavy-fermion YbNi4P2}},
  author = {Will Broad and Owen Moulding and Takaki Muramatsu and Manuel Brando and Alix McCollam and Femke Bangman and Gertrud Zwicknagl and Kristin Kliemt and Cornelius Krellner and Sven Friedemann},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.28119},
  eprint = {2608.28119},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.28119},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Field-tuned quasiparticles and electronic structure in heavy-fermion YbNi4P2
AU  - Will Broad
AU  - Owen Moulding
AU  - Takaki Muramatsu
AU  - Manuel Brando
AU  - Alix McCollam
AU  - Femke Bangman
AU  - Gertrud Zwicknagl
AU  - Kristin Kliemt
AU  - Cornelius Krellner
AU  - Sven Friedemann
PY  - 2026
DA  - 2026/08/28
PB  - arXiv
DO  - 10.48550/arxiv.2608.28119
UR  - https://arxiv.org/abs/2608.28119
AB  - We study the Fermi surface topology and quasiparticle properties in the heavy fermion compound YbNi4P2 at high magnetic fields using quantum oscillation measurements. We observe a large decrease of the quasiparticle mass with increasing field and demonstrate good qualitative agreement with the single-ion Kondo model. At the putative Lifshitz transition at 17 T, we observe a sudden change of quantum oscillation frequencies suggesting an abrupt change of the electronic structure and/or quasiparticle characteristics. Our results demonstrate the ability to tune the electronic structure and provide input for theoretical models of YbNi4P2 and correlated electron systems in high magnetic fields.
ER  -