Faculty of Engineering , Hokkaido University , Kita 13, Nishi 8 , Sapporo 060-8628 , Japan.
Center for Crystal Science and Technology , University of Yamanashi , 7-32 Miyamae , Kofu 400-8511 , Japan.
Inorg Chem. 2018 May 7;57(9):5364-5370. doi: 10.1021/acs.inorgchem.8b00349. Epub 2018 Apr 20.
CePr OBiS powders and CePrOBiS single crystals were synthesized and their structure and superconductive properties were examined by X-ray diffraction, X-ray absorption, electronic resistivity, and magnetization. While PrOBiS was found to be in a monoclinic phase with one-dimensional Bi-S zigzag chains showing no superconductive transition above 0.1 K, CeOBiS was in a tetragonal phase with two-dimensional Bi-S planes showing zero resistivity below 1.3 K. In the range x = 0.3-0.9 in CePr OBiS, both monoclinic and tetragonal phases were formed together with zero resistivity up to a maximum temperature of 2.2 K. A CePrOBiS single crystal, which showed both zero resistivity and a decrease in magnetization at ∼2.4 K, presented a tetragonal structure. Short Bi-S bonding in flat two-dimensional Bi-S planes and mixed Ce/Ce were characteristic features of the CePrOBiS single crystal, which presumably triggered its superconductivity.
CePrOBiS 粉末和 CePrOBiS 单晶被合成，并通过 X 射线衍射、X 射线吸收、电子电阻率和磁化率来研究其结构和超导性能。虽然 PrOBiS 被发现处于具有一维 Bi-S 之字形链的单斜相中，在 0.1 K 以上没有超导转变，但 CeOBiS 处于具有二维 Bi-S 平面的四方相中，在 1.3 K 以下具有零电阻率。在 CePrOBiS 中 x = 0.3-0.9 的范围内，共形成了单斜相和四方相，零电阻率最高可达 2.2 K。CePrOBiS 单晶在 2.4 K 左右表现出零电阻率和磁化率降低，呈现出四方结构。二维 Bi-S 平面中短的 Bi-S 键合和混合的 Ce/Ce 是 CePrOBiS 单晶的特征，这可能引发了其超导性。
