论文标题
铁粉红元素超导体的电子相图FESE1-XSX和FESE1-YTEY
Electronic phase diagram of iron chalcogenide superconductors FeSe1-xSx and FeSe1-yTey
论文作者
论文摘要
在这里，我们建立了等电源FESE1-XSX（0.19> x> 0.0）和FESE1-YTEY（0.04 <Y <1.0）单晶的组合电子相图。 Y = 0.04-0.30的FESE1-YTEY晶体通过水热离子分离（HID）方法生长。基于特异性热，电传输和角度分辨光发射光谱的组合实验，与FESE1-yTEY样品相比，在HID FESE1-yTEY样品中观察到四方对称性旋转过渡到正交（nematic）相。霍尔系数的无处不在的倾斜温度依赖性在四方方向上的特征温度t*周围观察到，该温度t*远高于超导过渡。更重要的是，我们发现超导过渡温度TC与FESE1-XSX和FESE1-YTEY系统的Hall-Dip温度T*正相关，这表明四方背景是超导性的基本宿主。
Here we establish a combined electronic phase diagram of isoelectronic FeSe1-xSx (0.19 > x > 0.0) and FeSe1-yTey (0.04 < y < 1.0) single crystals. The FeSe1-yTey crystals with y = 0.04 - 0.30 are grown by a hydrothermal ion-deintercalation (HID) method. Based on combined experiments of the specific heat, electrical transport, and angle-resolved photoemission spectroscopy, no signature of the tetragonal-symmetry-broken transition to orthorhombic (nematic) phase is observed in the HID FeSe1-yTey samples, as compared with the FeSe1-xSx samples showing this transition at Ts. A ubiquitous dip-like temperature dependence of the Hall coefficient is observed around a characteristic temperature T* in the tetragonal regimes, which is well above the superconducting transition. More importantly, we find that the superconducting transition temperature Tc is positively correlated with the Hall-dip temperature T* across the FeSe1-xSx and FeSe1-yTey systems, suggesting that the tetragonal background is a fundamental host for the superconductivity.
