论文标题
Fe（SE，TE）弹性中的多型效应
Multiband effect in elastoresistance of Fe(Se,Te)
论文作者
论文摘要
我们已经研究了两个FESE $ {} _ {1 -x} $ TE $ {} _ {x} $（x} $（x约0.4-0.5）化合物的弹性抗性，这些化合物具有接近化学成分，但在电子性能中有显着差异。第一个化合物具有负电阻系数，除了超导外，没有显示任何相变。该化合物的弹性耐药性大约遵循$ 1/t $低的低点，因为它通常以金属电导率发生在Fe（Se，S）中。第二种化合物具有金属类型的电导率，除了超导过渡外，在大约30 K的温度下还存在一个相变。第二种化合物的弹性是签名的弹性，并且可以用两个居里 - 维斯类型的符号和不同的重要温度和不同的贡献竞争的竞争来近似，这表明了对Elastoresises的竞争。
We have investigated the elastoresistance of two FeSe${}_{1-x}$Te${}_{x}$ (x about 0.4 - 0.5) compounds that have a close chemical composition but differ significantly in electronic properties. The first compound has a negative temperature coefficient of resistance and does not show any phase transitions other than superconducting. The elastoresistance of this compound approximately follows $1/T$ low as it usually occurs in Fe(Se,S) with metallic conductivity. The second compound has a metallic type of conductivity and in addition to the superconducting transition, there is also a phase transition at a temperature of about 30 K. The elastoresistance of the second compound is sign-reversing and can be approximated with the sum of two Curie-Weiss type terms with opposite signs and different critical temperatures which suggest a competition of contributions to the elastoresistance from different band valleys.
