In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe$_2$
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914065518952448 |
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| author | Guo, Xuefei Kogar, Anshul Henke, Jans Flicker, Felix de Juan, Fernando Sun, Stella X. -L. Khayr, Issam Peng, Yingying Lee, Sangjun Krogstad, Matthew J. Rosenkranz, Stephan Osborn, Raymond Ruff, Jacob P. C. Lioi, David B. Karapetrov, Goran Campbell, Daniel J. Paglione, Johnpierre van Wezel, Jasper Chiang, Tai C. Abbamonte, Peter |
| author_facet | Guo, Xuefei Kogar, Anshul Henke, Jans Flicker, Felix de Juan, Fernando Sun, Stella X. -L. Khayr, Issam Peng, Yingying Lee, Sangjun Krogstad, Matthew J. Rosenkranz, Stephan Osborn, Raymond Ruff, Jacob P. C. Lioi, David B. Karapetrov, Goran Campbell, Daniel J. Paglione, Johnpierre van Wezel, Jasper Chiang, Tai C. Abbamonte, Peter |
| contents | We report measurements of anisotropic triple-$q$ charge density wave (CDW) fluctuations in the transition metal dichalcogenide 1$T$-TiSe$_2$ over a large volume of reciprocal space with X-ray diffuse scattering. Above the transition temperature, $T_{\text{CDW}}$, the out-of-plane diffuse scattering is characterized by rod-like structures which indicate that the CDW fluctuations in neighboring layers are largely decoupled. In addition, the in-plane diffuse scattering is marked by ellipses which reveal that the in-plane fluctuations are anisotropic. Our analysis of the diffuse scattering line shapes and orientations suggests that the three charge density wave components contain independent phase fluctuations. At $T_{\text{CDW}}$, long range coherence is established in both the in-plane and out-of-plane directions, consistent with the large observed value of the CDW gap compared to $T_{\text{CDW}}$, and the predicted presence of a hierarchy of energy scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_09968 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe$_2$ Guo, Xuefei Kogar, Anshul Henke, Jans Flicker, Felix de Juan, Fernando Sun, Stella X. -L. Khayr, Issam Peng, Yingying Lee, Sangjun Krogstad, Matthew J. Rosenkranz, Stephan Osborn, Raymond Ruff, Jacob P. C. Lioi, David B. Karapetrov, Goran Campbell, Daniel J. Paglione, Johnpierre van Wezel, Jasper Chiang, Tai C. Abbamonte, Peter Strongly Correlated Electrons Materials Science We report measurements of anisotropic triple-$q$ charge density wave (CDW) fluctuations in the transition metal dichalcogenide 1$T$-TiSe$_2$ over a large volume of reciprocal space with X-ray diffuse scattering. Above the transition temperature, $T_{\text{CDW}}$, the out-of-plane diffuse scattering is characterized by rod-like structures which indicate that the CDW fluctuations in neighboring layers are largely decoupled. In addition, the in-plane diffuse scattering is marked by ellipses which reveal that the in-plane fluctuations are anisotropic. Our analysis of the diffuse scattering line shapes and orientations suggests that the three charge density wave components contain independent phase fluctuations. At $T_{\text{CDW}}$, long range coherence is established in both the in-plane and out-of-plane directions, consistent with the large observed value of the CDW gap compared to $T_{\text{CDW}}$, and the predicted presence of a hierarchy of energy scales. |
| title | In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe$_2$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2501.09968 |