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Electron g-value comparison of paramagnetic muonium and hydrogen centers in rutile TiO2

  • T. U. Ito
  • W. Higemoto
  • A. Koda
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Abstract

Muonium (Mu) is widely used as a model for isolated hydrogen in condensed matter, but whether its electronic state is truly equivalent to that of hydrogen remains to be tested with an orbital-sensitive probe. Here we use double electron-muon resonance to determine the electron g values of the paramagnetic Mu center in rutile TiO2 for magnetic fields along [100], [110], and [001] directions. The obtained g values closely follow those of the H-related Ti3+ paramagnetic center in both magnitude and anisotropy. This agreement tests the Mu--H correspondence at the level of the Ti 3d electronic state and supports a common localized Ti3+ electronic core for the two centers.

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Cite

BibTeXRIS
BibTeX
@misc{ito2026electron,
  title = {{Electron $g$-value comparison of paramagnetic muonium and hydrogen centers in rutile TiO$_2$}},
  author = {T. U. Ito and W. Higemoto and A. Koda},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.19338},
  eprint = {2609.19338},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.19338},
}
RIS
TY  - UNPB
TI  - Electron g-value comparison of paramagnetic muonium and hydrogen centers in rutile TiO_2
AU  - T. U. Ito
AU  - W. Higemoto
AU  - A. Koda
PY  - 2026
DA  - 2026/09/16
PB  - arXiv
DO  - 10.48550/arxiv.2609.19338
UR  - https://arxiv.org/abs/2609.19338
AB  - Muonium (Mu) is widely used as a model for isolated hydrogen in condensed matter, but whether its electronic state is truly equivalent to that of hydrogen remains to be tested with an orbital-sensitive probe. Here we use double electron-muon resonance to determine the electron g values of the paramagnetic Mu center in rutile TiO_2 for magnetic fields along [100], [110], and [001] directions. The obtained g values closely follow those of the H-related Ti^3+ paramagnetic center in both magnitude and anisotropy. This agreement tests the Mu--H correspondence at the level of the Ti 3d electronic state and supports a common localized Ti^3+ electronic core for the two centers.
ER  -