Ultrafast measurements under anisotropic strain reveal near equivalence of competing charge orders in TbTe$_3$
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909302836428800 |
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| author | Kim, Soyeun Orenstein, Gal Singh, Anisha G. Fisher, Ian R. Reis, David A. Trigo, Mariano |
| author_facet | Kim, Soyeun Orenstein, Gal Singh, Anisha G. Fisher, Ian R. Reis, David A. Trigo, Mariano |
| contents | We report ultrafast reflectivity measurements of the dynamics of the order parameter of the charge density wave (CDW) in TbTe$_3$ under anisotropic strain. We observe an increase in the frequency of the amplitude mode with increasing tensile strain along the $a$-axis (which drives the lattice into $a>c$, with $a$ and $c$ the lattice constants), and similar behavior for tensile strain along $c$ ($c>a$). This suggests that both strains stabilize the corresponding CDW order and further support the near equivalence of the CDW phases oriented in $a$- and $c$-axis, in spite of the orthorhombic space group. The results were analyzed within the time-dependent Ginzburg-Landau framework, which agrees well with the reflectivity dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17437 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast measurements under anisotropic strain reveal near equivalence of competing charge orders in TbTe$_3$ Kim, Soyeun Orenstein, Gal Singh, Anisha G. Fisher, Ian R. Reis, David A. Trigo, Mariano Strongly Correlated Electrons We report ultrafast reflectivity measurements of the dynamics of the order parameter of the charge density wave (CDW) in TbTe$_3$ under anisotropic strain. We observe an increase in the frequency of the amplitude mode with increasing tensile strain along the $a$-axis (which drives the lattice into $a>c$, with $a$ and $c$ the lattice constants), and similar behavior for tensile strain along $c$ ($c>a$). This suggests that both strains stabilize the corresponding CDW order and further support the near equivalence of the CDW phases oriented in $a$- and $c$-axis, in spite of the orthorhombic space group. The results were analyzed within the time-dependent Ginzburg-Landau framework, which agrees well with the reflectivity dynamics. |
| title | Ultrafast measurements under anisotropic strain reveal near equivalence of competing charge orders in TbTe$_3$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.17437 |