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arXiv 1010.0263cond-mat.supr-con
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Fe1 +y(Te1-xSx)z的热激活能和磁通霍尔效应

Thermally activated energy and flux flow Hall effect of Fe1+y(Te1-xSx)z

Hechang Lei, Rongwei Hu, E. S. Choi, C. Petrovic

摘要:

研究了混合态Fe(Te,S)单晶在35 T以下磁场中的热激活磁通流(TAFF)和磁通流霍尔效应(FFHE)。采用传统的Arkenius关系和修正的TAFF理论对热激活能进行了分析,修正的TAFF理论更接近实验结果。结果表明,随着磁场的增加,单涡旋钉扎区向集体蠕变钉扎区过渡。TAE的温度依赖性对于H//ab和H//c是不同的。另一方面,在混合状态下的FFHE的分析表明,没有霍尔符号反转。我们还观察到缩放行为|Rhoxy(H)|= A*Rhoxx(H)^beta。

英文摘要:

Thermally activated flux flow (TAFF) and flux flow Hall effect (FFHE) of Fe(Te,S) single crystal in the mixed state are studied in magnetic fields up to 35 T. Thermally activated energy (TAE) is analyzed using conventional Arrhenius relation and modified TAFF theory which is closer to experimental results. The results indicate that there is a crossover from single-vortex pinning region to collective creep pinning region with increasing magnetic field. The temperature dependence of TAE is different for H//ab and H//c. On the other hand, the analysis of FFHE in the mixed state indicates that there is no Hall sign reversal. We also observe scaling behavior |Rhoxy(H)| = A*Rhoxx(H)^beta.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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