Absence of ${E}_{2g}$ Nematic Instability and Dominant ${A}_{1g}$ Response in the Kagome Metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$

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dc.citation.articleNumber31015en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitlePhysical Review Xen_US
dc.citation.volumeNumber14en_US
dc.contributor.authorLiu, Zhaoyuen_US
dc.contributor.authorShi, Yueen_US
dc.contributor.authorJiang, Qiannien_US
dc.contributor.authorRosenberg, Elliott W.en_US
dc.contributor.authorDeStefano, Jonathan M.en_US
dc.contributor.authorLiu, Jinjinen_US
dc.contributor.authorHu, Chaoweien_US
dc.contributor.authorZhao, Yuzhouen_US
dc.contributor.authorWang, Zhiweien_US
dc.contributor.authorYao, Yuguien_US
dc.contributor.authorGraf, Daviden_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorYang, Jihuien_US
dc.contributor.authorXu, Xiaodongen_US
dc.contributor.authorChu, Jiun-Hawen_US
dc.date.accessioned2024-08-09T16:25:25Zen_US
dc.date.available2024-08-09T16:25:25Zen_US
dc.date.issued2024en_US
dc.description.abstractEver since the discovery of the charge density wave (CDW) transition in the kagome metal CsV3⁢Sb5, the nature of its symmetry breaking has been under intense debate. While evidence suggests that the rotational symmetry is already broken at the CDW transition temperature (𝑇CDW), an additional electronic nematic instability well below 𝑇CDW has been reported based on the diverging elastoresistivity coefficient in the anisotropic channel (𝑚𝐸2⁢𝑔). Verifying the existence of a nematic transition below 𝑇CDW is not only critical for establishing the correct description of the CDW order parameter, but also important for understanding low-temperature superconductivity. Here, we report elastoresistivity measurements of CsV3⁢Sb5 using three different techniques probing both isotropic and anisotropic symmetry channels. Contrary to previous reports, we find the anisotropic elastoresistivity coefficient 𝑚𝐸2⁢𝑔 is temperature independent, except for a step jump at 𝑇CDW. The absence of nematic fluctuations is further substantiated by measurements of the elastocaloric effect, which show no enhancement associated with nematic susceptibility. On the other hand, the symmetric elastoresistivity coefficient 𝑚𝐴1⁢𝑔 increases below 𝑇CDW, reaching a peak value of 90 at 𝑇*=20 K. Our results strongly indicate that the phase transition at 𝑇* is not nematic in nature and the previously reported diverging elastoresistivity is due to the contamination from the 𝐴1⁢𝑔 channel.en_US
dc.identifier.citationLiu, Z., Shi, Y., Jiang, Q., Rosenberg, E. W., DeStefano, J. M., Liu, J., Hu, C., Zhao, Y., Wang, Z., Yao, Y., Graf, D., Dai, P., Yang, J., Xu, X., & Chu, J.-H. (2024). Absence of ${E}_{2g}$ Nematic Instability and Dominant ${A}_{1g}$ Response in the Kagome Metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$. Physical Review X, 14(3), 031015. https://doi.org/10.1103/PhysRevX.14.031015en_US
dc.identifier.digitalPhysRevX-14-031015en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevX.14.031015en_US
dc.identifier.urihttps://hdl.handle.net/1911/117631en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleAbsence of ${E}_{2g}$ Nematic Instability and Dominant ${A}_{1g}$ Response in the Kagome Metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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