论文标题
FESE $ _ {1-x} $ s $ _ {x} $ $（0 \ leq x \ leq 1）$单晶的水热合成和完整的相图
Hydrothermal synthesis and complete phase diagram of FeSe$_{1-x}$S$_{x}$ $(0 \leq x \leq 1)$ single crystals
论文作者
论文摘要
我们报告了FESE $ _ {1-x} $ s $ _ {x} $单晶的成功合成，并通过$ x $从0到1通过水热方法。 FESE $ _ {1-x} $ s $ _ {x} $的完整相图是根据电阻率和磁化测量获得的。 nematicition被$ x $增加抑制，并且在列前阶段出现了一个小的超导圆顶。在列前阶段之外，超导性被连续抑制，并在$ x $ = 0.45时达到最低$ t_c $;除此之外，$ t_c $慢慢增加，直到$ x $ = 1。有趣的是，在中间区域中，观察到的中间区域中具有特征温度的异常电阻率上升，观察到了$ t^*$。 $ t^{*} $显示了一个类似圆顶的行为，最大值为$ x $ = 0.45，这与$ t_c $的演变相反，表明$ t^*$和超导性之间的竞争。 $ t^*$的起源进行了详细讨论。此外，正常状态的电阻率从非富特液体转变为费米 - 液体行为，在低温下掺杂，并伴随着电子相关性的降低。我们的研究涉及高S掺杂区域中缺乏单晶，并提供了一个完整的相图，这将促进对nematicity，超导性和磁性之间关系的研究。
We report the successful synthesis of FeSe$_{1-x}$S$_{x}$ single crystals with $x$ ranging from 0 to 1 via a hydrothermal method. A complete phase diagram of FeSe$_{1-x}$S$_{x}$ has been obtained based on resistivity and magnetization measurements. The nematicity is suppressed with increasing $x$, and a small superconducting dome appears within the nematic phase. Outside the nematic phase, the superconductivity is continuously suppressed and reaches a minimum $T_c$ at $x$ = 0.45; beyond this point, $T_c$ slowly increases until $x$ = 1. Intriguingly, an anomalous resistivity upturn with a characteristic temperature $T^*$ in the intermediate region of $0.31 \leq x \leq 0.71$ is observed. $T^{*}$ shows a dome-like behavior with a maximum value at $x$ = 0.45, which is opposite the evolution of $T_c$, indicating competition between $T^*$ and superconductivity. The origin of $T^*$ is discussed in detail. Furthermore, the normal state resistivity evolves from non-Fermi-liquid to Fermi-liquid behavior with S doping at low temperatures, accompanied by a reduction in electronic correlations. Our study addresses the lack of single crystals in the high-S doping region and provides a complete phase diagram, which will promote the study of relations among nematicity, superconductivity, and magnetism.
