The vortex state of FeSe1 − xTex superconducting thin films
The vortex state of FeSe1 − xTex superconducting thin films
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DOI：
10.1088/0953-2048/24/10/105011
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发表时间：
2011-10
影响因子：
3.6
通讯作者：
H. Chang;J. Y. Luo;C T Wu;F. Hsu;T W Huang;P. Wu;M K Wu;M J Wang
中科院分区：
文献类型：
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作者：
H. Chang;J. Y. Luo;C T Wu;F. Hsu;T W Huang;P. Wu;M K Wu;M J Wang
报道了Te替代FeSe_1-−_xTex超导薄膜的涡旋动力学。低Te取代率薄膜的电场-电流密度(E-J)曲线在低至0.5TC的温度下仍受热激活磁通流模型的支配。相反，我们在高Te取代的薄膜中清楚地观察到了涡旋液体-玻璃转变。这些样品的E-J曲线很好地符合基于三维涡旋玻璃理论的标度关系。我们的结果表明，随着Te含量的增加，涡旋钉扎作用增强，这可能是由于间隙位置的过量Fe造成的。
We report the vortex dynamics of tellurium substituted FeSe1 − xTex superconducting thin films. The electric field versus current density (E–J) curve for films with low Te substitution is still governed by the thermally activated flux flow model at temperatures as low as 0.5TCoffset. In contrast, we clearly observed a vortex liquid–glass transition in films with high Te substitution. The E–J curves of these samples fit nicely to the scaling relations based on the 3D vortex glass theory. Our results reveal an enhancement of the vortex pinning as more Te content is introduced, which probably originates from the excess Fe at the interstitial site.