First Order Preemptive Ising-nematic Transition in K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Giles-Donovan, N. Chen, Y. Fukui, H. Manjo, T. Ishikawa, D. Baron, A. Q. R. Chi, S. Zhong, H. Cao, S. Tang, Y. Wang, Y. Lu, X. Song, Y. Birgeneau, R. J. |
| author_facet | Giles-Donovan, N. Chen, Y. Fukui, H. Manjo, T. Ishikawa, D. Baron, A. Q. R. Chi, S. Zhong, H. Cao, S. Tang, Y. Wang, Y. Lu, X. Song, Y. Birgeneau, R. J. |
| contents | Employing inelastic X-ray scattering and neutron scattering techniques, we observed nematic and magnetic phase transitions with distinct characters in K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$. Upon cooling, the nematic order undergoes a strongly first-order phase transition followed by a second-order magnetic transition at $T_{\textrm{N}}$ $\approx$ 34.6 K. The temperature difference between these two phase transitions is $\sim$ 1 K. The observed phenomenon can be attributed to a distinctive first-order preemptive Ising-nematic transition, a characteristic unique to a quasi-two-dimensional scenario marked by strong out-of-plane spatial anisotropy due to weak coupling. Our studies establish K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$ as the first material in the family of iron pnictides and chalcogenides that possesses a nematic tricritical point preceding the magnetic one upon decreasing nematic coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_14706 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | First Order Preemptive Ising-nematic Transition in K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$ Giles-Donovan, N. Chen, Y. Fukui, H. Manjo, T. Ishikawa, D. Baron, A. Q. R. Chi, S. Zhong, H. Cao, S. Tang, Y. Wang, Y. Lu, X. Song, Y. Birgeneau, R. J. Strongly Correlated Electrons Employing inelastic X-ray scattering and neutron scattering techniques, we observed nematic and magnetic phase transitions with distinct characters in K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$. Upon cooling, the nematic order undergoes a strongly first-order phase transition followed by a second-order magnetic transition at $T_{\textrm{N}}$ $\approx$ 34.6 K. The temperature difference between these two phase transitions is $\sim$ 1 K. The observed phenomenon can be attributed to a distinctive first-order preemptive Ising-nematic transition, a characteristic unique to a quasi-two-dimensional scenario marked by strong out-of-plane spatial anisotropy due to weak coupling. Our studies establish K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$ as the first material in the family of iron pnictides and chalcogenides that possesses a nematic tricritical point preceding the magnetic one upon decreasing nematic coupling. |
| title | First Order Preemptive Ising-nematic Transition in K$_{5}$Fe$_{4}$Ag$_{6}$Te$_{10}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.14706 |