Investigation of Transport Properties for FeSe${}_{1-x}$Te${}_x$ Thin Films under Magnetic Fields

Abstract

We investigated the transport properties under magnetic fields of up to 9 T for FeSe${}_{1-x}$Te${}_x$ thin films on CaF${}_2$. Measurements of the temperature dependence of the electrical resistivity revealed that for $x=0.2-0.4$, where $T_{\mathrm{c}}$ is the highest, the width of the superconducting transition increased with increasing magnetic field, while the width was almost the same with increasing magnetic field for $x=0-0.1$. In addition, the temperature dependence of the Hall coefficient drastically changed between $x=0.1$ and $0.2$ at low temperatures. These results indicate that clear differences in the nature of the superconductivity and electronic structure exist between $x=0-0.1$ and $x\ge 0.2$.

arXiv comment10 pages, 5 figures

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Cited by in corpus (6)

• Systematic study on transport properties of FeSe thin films with various degrees of strain
• Close correlation between superconducting transition temperatures and carrier densities in Te- and S-substituted FeSe thin films
• Superconducting fluctuations in FeSe${}_{0.5}$Te${}_{0.5}$ thin films probed via microwave spectroscopy
• Relationships between Superconductivity and Nematicity in FeSe${}_{1-x}$Te${}_x$ ($x=0-0.5$) Films Studied by Complex Conductivity Measurements
• Studies of superconductivity of Fe chalcogenides in films grown by PLD technique
• Onset Temperatures for Superconducting Fluctuations in Te-annealed FeTe${}_{1-x}$Se${}_x$ Single Crystals: Evidence for the BCS-BEC Crossover