四斜晶系FeS（mackinawite）的压力相关磁化和磁阻研究：揭示其内在的金属特征
Pressure-dependent magnetization and magnetoresistivity studies on the tetragonal FeS (mackinawite): revealing its intrinsic metallic character
摘要：
在2 $\leq T\leq $ 300 K、$H\leq$ 70 kOe和$P\leq$ 3.0 GPa范围内，利用磁电阻率和磁化强度研究了四元铁$_{1+δ}$ S的输运和磁性.此外，还应用了室温X射线衍射和光电子能谱学。与先前报道的非金属特性相反，Fe $_{1+δ}$ S本质上是金属的，但由于存在弱局部化，这种金属特性在室温以下不表现出。施加的压力强烈地降低了这种附加的电阻贡献，并因此提高了金属特性的温度范围，对于$\sim$ 3 GPa，金属特性的温度范围明显下降到75 K。超导电性的缺乏以及弱局域化背后的机制将被讨论。
英文摘要：
The transport and magnetic properties of the tetragonal Fe$_{1+δ}$S were investigated using magnetoresistivity and magnetization within 2$\leq T\leq $300 K, $H\leq$70 kOe and $P\leq$ 3.0 GPa. In addition, room-temperature X-ray diffraction and photoelectron spectroscopy were also applied. In contrast to previously reported nonmetallic character, Fe$_{1+δ}$S is intrinsically metallic but due to a presence of a weak localization such metallic character is not exhibited below room temperature. An applied pressure reduces strongly this additional resistive contribution and as such enhances the temperature range of the metallic character which, for $\sim$3 GPa, is evident down to 75 K. The absence of superconductivity as well as the mechanism behind the weak localization will be discussed.
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