Cubic-Zn(1-x)Mn(x)Te optical modes across the phonon and phonon-polariton regimes

Abstract

Alloying offers a convenient route to tune the physical properties of semiconductors, at the price, however, of local lattice/bond distortions needed to accommodate the lattice mismatch. Being nearly lattice-matched and moreover highly resistant to lattice and bond distortions thanks to a largely covalent bonding, cubic Zn(1-x)Mn(x)Te sets a benchmark to test the sensitivity of lattice vibrations to minimum lattice and bond distortions induced by alloying. We explore experimentally the two transverse optical regimes of cubic Zn(1-x)Mn(x)Te (x<0.7), with ab initio calculations in support: (1) the phonon-polariton regime at quasi-infinite (photon-like) wavelengths averaging over the alloy disorder, probed by forward-Raman scattering, and (2) the purely-mechanical phonon regime down to minimum wavelengths nearly matching the lattice constant zooming into the alloy disorder, achieved by inelastic neutron scattering. The short Zn-Te bond is found to exhibit a compact optical duo distinguishing homo from hetero local bond environments (1 bond: 2 mode), as explained by the percolation model. This deviates from the historical Zn(1-x)Mn(x)Te MREI (modified-random-element-isodisplacement) scheme inspired from classical Raman and infrared studies, in which the optical modes are blind to the bond environment (1-bond: 1-mode). So, the test is positive, reinforcing the status of the percolation scheme as a robust decryptor of (even small) lattice distortions induced by alloying through the lattice dynamics.

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BibTeX RIS

BibTeX

@misc{mina2026cubiczn1xmnxte,
  title = {{Cubic-Zn(1-x)Mn(x)Te optical modes across the phonon and phonon-polariton regimes}},
  author = {M. Mina and A. Elmahjoubi and T. Ngulezhu and S. Thiam and A. V. Postnikov and T. Tite and P. Bourges and F. Bourdarot and N. Biniskos and A. Polian and Y. Le Godec and N. Guignot and J. -P. Itie and S. Diliberto and S. Michel and A. Maillard and A. En Naciri and L. Broch and P. Franchetti and K. Strzalkowski and O. Pages},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.40157},
  eprint = {2610.40157},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.40157},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Cubic-Zn(1-x)Mn(x)Te optical modes across the phonon and phonon-polariton regimes
AU  - M. Mina
AU  - A. Elmahjoubi
AU  - T. Ngulezhu
AU  - S. Thiam
AU  - A. V. Postnikov
AU  - T. Tite
AU  - P. Bourges
AU  - F. Bourdarot
AU  - N. Biniskos
AU  - A. Polian
AU  - Y. Le Godec
AU  - N. Guignot
AU  - J. -P. Itie
AU  - S. Diliberto
AU  - S. Michel
AU  - A. Maillard
AU  - A. En Naciri
AU  - L. Broch
AU  - P. Franchetti
AU  - K. Strzalkowski
AU  - O. Pages
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2610.40157
UR  - https://arxiv.org/abs/2610.40157
AB  - Alloying offers a convenient route to tune the physical properties of semiconductors, at the price, however, of local lattice/bond distortions needed to accommodate the lattice mismatch. Being nearly lattice-matched and moreover highly resistant to lattice and bond distortions thanks to a largely covalent bonding, cubic Zn(1-x)Mn(x)Te sets a benchmark to test the sensitivity of lattice vibrations to minimum lattice and bond distortions induced by alloying. We explore experimentally the two transverse optical regimes of cubic Zn(1-x)Mn(x)Te (x<0.7), with ab initio calculations in support: (1) the phonon-polariton regime at quasi-infinite (photon-like) wavelengths averaging over the alloy disorder, probed by forward-Raman scattering, and (2) the purely-mechanical phonon regime down to minimum wavelengths nearly matching the lattice constant zooming into the alloy disorder, achieved by inelastic neutron scattering. The short Zn-Te bond is found to exhibit a compact optical duo distinguishing homo from hetero local bond environments (1 bond: 2 mode), as explained by the percolation model. This deviates from the historical Zn(1-x)Mn(x)Te MREI (modified-random-element-isodisplacement) scheme inspired from classical Raman and infrared studies, in which the optical modes are blind to the bond environment (1-bond: 1-mode). So, the test is positive, reinforcing the status of the percolation scheme as a robust decryptor of (even small) lattice distortions induced by alloying through the lattice dynamics.
ER  -

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