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PreprintCC BY-NC-ND 4.0arXiv

Spectroscopic signatures of mode-selective electron-phonon coupling in transient reflectivity change on charge-density-wave TiSe2

  • Yu Mizukoshi
  • Muneaki Hase
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Abstract

We report on time- and spectrally resolved pump-probe spectroscopy measurement on the charge-density wave (CDW) state of TiSe2 at helium temperatures. The non-oscillatory component of the spectrally resolved signals exhibit a sign reversal near 1.5 eV, which was interpreted as a redshift of the optical transition energy originated from the interband transition between the Se p-based valence band to the Ti d-derived conduction band. Furthermore, the oscillatory components exhibit distinct spectral dependences between the optical phonons and the CDW-derived modes, suggesting the mode-selective coupling.

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Cite

BibTeXRIS
BibTeX
@misc{mizukoshi2026spectroscopic,
  title = {{Spectroscopic signatures of mode-selective electron-phonon coupling in transient reflectivity change on charge-density-wave TiSe$_2$}},
  author = {Yu Mizukoshi and Muneaki Hase},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.10348},
  eprint = {2609.10348},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.10348},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Spectroscopic signatures of mode-selective electron-phonon coupling in transient reflectivity change on charge-density-wave TiSe_2
AU  - Yu Mizukoshi
AU  - Muneaki Hase
PY  - 2026
DA  - 2026/09/09
PB  - arXiv
DO  - 10.48550/arxiv.2609.10348
UR  - https://arxiv.org/abs/2609.10348
AB  - We report on time- and spectrally resolved pump-probe spectroscopy measurement on the charge-density wave (CDW) state of TiSe_2 at helium temperatures. The non-oscillatory component of the spectrally resolved signals exhibit a sign reversal near 1.5 eV, which was interpreted as a redshift of the optical transition energy originated from the interband transition between the Se p-based valence band to the Ti d-derived conduction band. Furthermore, the oscillatory components exhibit distinct spectral dependences between the optical phonons and the CDW-derived modes, suggesting the mode-selective coupling.
ER  -