Revealing the nature of the charge density wave order of ErTe$_3$ via Raman scattering under anisotropic strain
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910165236711424 |
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| author | Freitas, Theotime Udina, Mattia Alekhin, Alexandr Nilforoushan, Niloufar Houver, Sarah Sacuto, Alain Gonzalez, Benito A. Fisher, Ian R. Paul, Indranil Gallais, Yann |
| author_facet | Freitas, Theotime Udina, Mattia Alekhin, Alexandr Nilforoushan, Niloufar Houver, Sarah Sacuto, Alain Gonzalez, Benito A. Fisher, Ian R. Paul, Indranil Gallais, Yann |
| contents | The nature of the charge density wave (CDW) order of the rare-earth tritelluride ErTe3 is investigated by Raman scattering under anisotropic strain. The CDW state of ErTe3 is unconventional since it is accompanied by an unusual mirror symmetry breaking, whose origin remains to be understood. Studying the polarization-resolved Raman spectrum of the CDW amplitude mode as a function of strain and temperature, we find that the mirror symmetry breakings of the CDW state are not independent, arguing against the recently proposed ferro-axial multi-component CDW order. Instead, we show that a single component CDW order parameter with an ordering wavevector tilted away from the principle crystallographic axis can reproduce the observed mirror symmetry breakings and their manifestation in the Raman spectra. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_08440 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Revealing the nature of the charge density wave order of ErTe$_3$ via Raman scattering under anisotropic strain Freitas, Theotime Udina, Mattia Alekhin, Alexandr Nilforoushan, Niloufar Houver, Sarah Sacuto, Alain Gonzalez, Benito A. Fisher, Ian R. Paul, Indranil Gallais, Yann Strongly Correlated Electrons The nature of the charge density wave (CDW) order of the rare-earth tritelluride ErTe3 is investigated by Raman scattering under anisotropic strain. The CDW state of ErTe3 is unconventional since it is accompanied by an unusual mirror symmetry breaking, whose origin remains to be understood. Studying the polarization-resolved Raman spectrum of the CDW amplitude mode as a function of strain and temperature, we find that the mirror symmetry breakings of the CDW state are not independent, arguing against the recently proposed ferro-axial multi-component CDW order. Instead, we show that a single component CDW order parameter with an ordering wavevector tilted away from the principle crystallographic axis can reproduce the observed mirror symmetry breakings and their manifestation in the Raman spectra. |
| title | Revealing the nature of the charge density wave order of ErTe$_3$ via Raman scattering under anisotropic strain |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.08440 |