Superconductivity in Novel BiS2-Based Layered Superconductor LaO1-xFxBiS2
Superconductivity in Novel BiS2-Based Layered Superconductor LaO1-xFxBiS2
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DOI：
10.1143/jpsj.81.114725
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发表时间：
2012-11-01
影响因子：
1.7
通讯作者：
Miura, Osuke
中科院分区：
文献类型：
--
作者：
Mizuguchi, Yoshikazu;Demura, Satoshi;Miura, Osuke
层状超导体由于其电子态的低维性，在凝聚态物理中提供了一些有趣的研究领域。例如，高T-c（高转变温度）铜酸盐和Fe基超导体具有由间隔（阻挡）层和导电（超导）层、CuO 2平面或Fe-阴离子层的堆叠构成的层状晶体结构。间隔层为导电层提供载流子并诱导奇异超导性。最近，我们报道了一种新的基于BiS 2的层状化合物Bi 4 O 4S 3的超导电性。发现Bi_4O_4S_3的超导电性起源于BiS_2层。晶体结构由BiS 2超导层和间隔层的堆叠组成，这类似于高T_c铜酸盐和铁基超导体。本文报道了一种新型的BiS_2基层状超导体LaO_（1-x）F_xBiS_2的发现，其T_c高达10.6K。
Layered superconductors have provided some interesting fields in condensed matter physics owing to the low dimensionality of their electronic states. For example, the high-T-c (high transition temperature) cuprates and the Fe-based superconductors possess a layered crystal structure composed of a stacking of spacer (blocking) layers and conduction (superconducting) layers, CuO2 planes or Fe-Anion layers. The spacer layers provide carriers to the conduction layers and induce exotic superconductivity. Recently, we have reported superconductivity in the novel BiS2-based layered compound Bi4O4S3. It was found that superconductivity of Bi4O4S3 originates from the BiS2 layers. The crystal structure is composed of a stacking of BiS2 superconducting layers and the spacer layers, which resembles those of high-T-c cuprate and the Fe-based superconductors. Here we report a discovery of a new type of BiS2-based layered superconductor LaO1-xFxBiS2, with a T-c as high as 10.6 K.