Raman signatures of cation vacancies in rare earth nitrides
We report a coordinated Raman/computation study of the rare-earth nitrides, a series of intrinsic ferromagnetic semiconductors, to reveal the presence of cation vacancies. Their presence is signaled by a Raman-active vibrational mode at 1100-1400 cm$^{-1}$, rising steadily as the lattice contracts across the series. The mode's frequency is in excellent agreement with the computed breathing-mode vibration of the six nitrogen ions surrounding cation vacancies. The discovery of such cation vacancies opens the door for hole doping that has so far been lacking in the exploitation of rare-earth nitrides.
Authors
- E. X. M. Trewick (ORCID: https://orcid.org/0000-0002-7941-6417)
- B. J. Ruck (ORCID: https://orcid.org/0000-0002-3719-7375)
- K. Van Koughnet (ORCID: https://orcid.org/0000-0001-9563-4126)
- F. Natali (ORCID: https://orcid.org/0000-0001-5407-1929)
- Liz Porteous
- Joe Trodahl (ORCID: https://orcid.org/0000-0003-4966-5348)
- W. F. Holmes-Hewett (ORCID: https://orcid.org/0000-0002-3437-4727)
- K. Kneisel (ORCID: https://orcid.org/0000-0003-1172-1607)
- Karl J. Friston
Institutions
- Victoria University of Wellington (NZ)
- MacDiarmid Institute for Advanced Materials and Nanotechnology (NZ)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-07-14
- DOI
- https://doi.org/10.1103/583w-9pt7
- Citations
- 3
- Primary Topic
- Inorganic Chemistry and Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.61