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PreprintCC BY 4.0arXiv

Bulk Superconductivity in Rocksalt LaN1−x

  • Caeli Benyacko
  • Lin-Ding Yuan
  • Josiah A. Turner
  • Laila Reimanis
  • Siyuan Ji
  • Cheng Li
  • Erick A. Lawrence
  • Hanna Z. Porter
  • James M. Rondinelli
  • Stephen D. Wilson
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Abstract

We report the synthesis and characterization of lanthanum nitride by direct reaction of lanthanum metal with high pressure nitrogen gas in a laser floating-zone furnace. Combined synchrotron X-ray and neutron diffraction measurement verifies a rocksalt structure with stoichiometry LaN0.94, consistent with first principles prediction that LaN is dynamically unstable in the stoichiometric limit. Electrical transport, heat capacity, and magnetization measurements show that LaN0.94 is metallic with a superconducting transition at Tc=5.95 K. Our data establish LaN as the first bulk superconducting member of the rare earth mononitride family and motivates future exploration of the series using the unique processing space afforded by high-pressure optical reactors.

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Cite

BibTeXRIS
BibTeX
@misc{benyacko2026bulk,
  title = {{Bulk Superconductivity in Rocksalt LaN$_1-x$}},
  author = {Caeli Benyacko and Lin-Ding Yuan and Josiah A. Turner and Laila Reimanis and Siyuan Ji and Cheng Li and Erick A. Lawrence and Hanna Z. Porter and James M. Rondinelli and Stephen D. Wilson},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.23213},
  eprint = {2609.23213},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.23213},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Bulk Superconductivity in Rocksalt LaN_1−x
AU  - Caeli Benyacko
AU  - Lin-Ding Yuan
AU  - Josiah A. Turner
AU  - Laila Reimanis
AU  - Siyuan Ji
AU  - Cheng Li
AU  - Erick A. Lawrence
AU  - Hanna Z. Porter
AU  - James M. Rondinelli
AU  - Stephen D. Wilson
PY  - 2026
DA  - 2026/09/19
PB  - arXiv
DO  - 10.48550/arxiv.2609.23213
UR  - https://arxiv.org/abs/2609.23213
AB  - We report the synthesis and characterization of lanthanum nitride by direct reaction of lanthanum metal with high pressure nitrogen gas in a laser floating-zone furnace. Combined synchrotron X-ray and neutron diffraction measurement verifies a rocksalt structure with stoichiometry LaN_0.94, consistent with first principles prediction that LaN is dynamically unstable in the stoichiometric limit. Electrical transport, heat capacity, and magnetization measurements show that LaN_0.94 is metallic with a superconducting transition at T_c=5.95 K. Our data establish LaN as the first bulk superconducting member of the rare earth mononitride family and motivates future exploration of the series using the unique processing space afforded by high-pressure optical reactors.
ER  -