Evolution of vortex matter, phase diagram, and upper critical field in the FeSe1−xSx system

Evolution of vortex matter, phase diagram, and upper critical field in the FeSe1−xSx system

We present a comprehensive study of vortex matter in the FeSe1−xSx system with various doping degree. The influence of sulphur substitution on peak effect occurrence is studied. Additionally, we study a possible vortex liquid-vortex glass/lattice transition and find an evidence that the vortex liqui...

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Veröffentlicht in:Superconductor science & technology 2021-03, Vol.34 (3)
Hauptverfasser: Vlasenko, V A, Sadakov, A V, Romanova, T A, Yu Gavrilkin, S, Dik, A V, Sobolevskiy, O A, Massalimov, B I, Chareev, D A, Vasiliev, A N, Maltsev, E I, Kuzmicheva, T E
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container_title Superconductor science & technology
container_volume 34
creator Vlasenko, V A
Sadakov, A V
Romanova, T A
Yu Gavrilkin, S
Dik, A V
Sobolevskiy, O A
Massalimov, B I
Chareev, D A
Vasiliev, A N
Maltsev, E I
Kuzmicheva, T E
description We present a comprehensive study of vortex matter in the FeSe1−xSx system with various doping degree. The influence of sulphur substitution on peak effect occurrence is studied. Additionally, we study a possible vortex liquid-vortex glass/lattice transition and find an evidence that the vortex liquid-vortex glass phase transition in FeSe1−xSx has a quasi two-dimensional nature. We investigate the upper critical field behaviour in FeSe1−xSx system, and found that the upper critical field is higher than that predicted by the Werthamer-Helfand-Hohenberg (WHH) model, whereas its temperature dependence could be fitted within a two-band framework. Finally, a detailed H-T phase diagram is presented.
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title Evolution of vortex matter, phase diagram, and upper critical field in the FeSe1−xSx system
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