Possible Evidence for Berezinskii–Kosterlitz–Thouless Transition in Ba(Fe<sub>0.914</sub>Co<sub>0.086</sub>)<sub>2</sub>As<sub>2</sub> Crystals
In this study, we measure the in-plane transport properties of high-quality Ba(Fe<sub>0.914</sub>Co<sub>0.086</sub>)<sub>2</sub>As<sub>2</sub> single crystals. Signatures of vortex unbinding Berezinskii–Kosterlitz–Thouless (BKT) transition are shown fr...
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| Autores principales: | , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/81dd857a02fd48f386c0228776c8ef09 |
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| Sumario: | In this study, we measure the in-plane transport properties of high-quality Ba(Fe<sub>0.914</sub>Co<sub>0.086</sub>)<sub>2</sub>As<sub>2</sub> single crystals. Signatures of vortex unbinding Berezinskii–Kosterlitz–Thouless (BKT) transition are shown from both the conventional approach and the Fisher–Fisher–Huse dynamic scaling analysis, in which a characteristic Nelson–Kosterlitz jump is demonstrated. We also observe a non-Hall transverse signal exactly at the superconducting transition, which is explained in terms of guided motion of unbound vortices. |
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