Buchumschlag

Two-step phase transitions in Fe(Se,Te)

Fuente: arXiv

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Bibliographische Detailangaben
Hauptverfasser:	Chareev, D. A., Gippius, A. A., Ovchenkov, Y. A., Presnov, D. E., Puzanova, I. G., Tkachev, A. V., Volkova, O. S., Zhurenko, S. V., Vasiliev, A. N.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Superconductivity
Online-Zugang:	Acceder al recurso
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

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author	Chareev, D. A. Gippius, A. A. Ovchenkov, Y. A. Presnov, D. E. Puzanova, I. G. Tkachev, A. V. Volkova, O. S. Zhurenko, S. V. Vasiliev, A. N.
author_facet	Chareev, D. A. Gippius, A. A. Ovchenkov, Y. A. Presnov, D. E. Puzanova, I. G. Tkachev, A. V. Volkova, O. S. Zhurenko, S. V. Vasiliev, A. N.
contents	In the studied crystals of FeSe0.7 Te0.3 , a structural phase transition occurs in two stages. At higher temperatures, the electronic subsystem undergoes a reconstruction, leading to a significant increase in elastoresistance. 77 Se NMR data show an abrupt change in the relaxation rate during this transition. The final transition occurs at a temperature several degrees below and is also accompanied by anomalies in the electronic properties. Thus, in the Fe(Se,Te) series, similarly to the behavior of pure FeSe under pressure, the type of transition changes and intermediate state appear before the structural transition is suppressed. This similarity between the corresponding phase diagrams is explained by the same deformation of the iron coordination environment in Fe(Se,Te) compounds and in FeSe under pressure. Our findings provide new and significant information on the phase diagram of Fe(Se,Te) compounds and in particular suggest the possible existence of a triple point near the quantum critical point.
format	Preprint
id	arxiv_https___arxiv_org_abs_2505_07807
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Two-step phase transitions in Fe(Se,Te) Chareev, D. A. Gippius, A. A. Ovchenkov, Y. A. Presnov, D. E. Puzanova, I. G. Tkachev, A. V. Volkova, O. S. Zhurenko, S. V. Vasiliev, A. N. Superconductivity In the studied crystals of FeSe0.7 Te0.3 , a structural phase transition occurs in two stages. At higher temperatures, the electronic subsystem undergoes a reconstruction, leading to a significant increase in elastoresistance. 77 Se NMR data show an abrupt change in the relaxation rate during this transition. The final transition occurs at a temperature several degrees below and is also accompanied by anomalies in the electronic properties. Thus, in the Fe(Se,Te) series, similarly to the behavior of pure FeSe under pressure, the type of transition changes and intermediate state appear before the structural transition is suppressed. This similarity between the corresponding phase diagrams is explained by the same deformation of the iron coordination environment in Fe(Se,Te) compounds and in FeSe under pressure. Our findings provide new and significant information on the phase diagram of Fe(Se,Te) compounds and in particular suggest the possible existence of a triple point near the quantum critical point.
title	Two-step phase transitions in Fe(Se,Te)
topic	Superconductivity
url	https://arxiv.org/abs/2505.07807