Applicability of the vortex-glass model for the single crystal Tl_(0.4)K_(0.41)Fe_(1.71)Se_2

• 作 者: 于一 汪春昌 汪洪 李秋菊 张昌锦 皮雳 张裕恒
• 机 构: School of Physics and Material Science, Anhui University,High Magnetic Field Laboratory, Chinese Aca
• 出 处: Chinese Physics B
• 发表日期: 2015年01期
• 关键词: vortex Fe Se_2 suitability isotherms layered discussion possibility perpendicula

We measure the current–voltage(I–V)characteristics for the single crystal of Tl0.4K0.41Fe1.71Se2with the superconducting transition temperature(TC)around 30.5 K,under a 10 T magnetic field applied perpendicular and parallel to the ab plane.We find that the shapes of the I–V isotherms are very different from the description by the vortex-glass(VG)model.Combining theoretical calculations and analysis of theρH⊥ab–T andρH ab–T data,we give an explicit discussion over the suitability of the VG model for the A0.8Fe2Se2superconductors,and point out the possibility of the material acting as a convenient platform for re-examination and further study of the complex vortex behaviors in the layered superconductors.

We measure the current-voltage (I-V) characteristics for a single crystal of Tl0.4K0.41Fe1.71Se2 with the superconducting transition temperature (TC) around 30.5 K, under a 10 T magnetic field applied perpendicular and parallel to the ab plane. We find that the shapes of the I-V isotherms are very different from the description by the vortex-glass (VG) model. Combining theoretical calculations and analysis of theρH⊥ ab-T and ρH ab-T data, we give an explicit discussion over the suitability of the VG model for the A0.8Fe2Se2superconductors, and point out the possibility of the material acting as a convenient platform for re-examination and further study of the complex vortex behaviors in the layered superconductors.