Superconductivity in Novel BiS2-Based Layered Superconductor LaO1-xFxBiS2
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概要
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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_{\text{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_{\text{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_{\text{c}} as high as 10.6 K.
- 2012-11-15
著者
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Takano Yoshihiko
National Inst. For Materials Sci. Ibaraki Jpn
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DEGUCHI Keita
National Institute for Materials Science
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Gotoh Yoshito
National Institute Of Advanced Industrial Science And Technology (aist)
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Takano Yoshihiko
National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
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Mizuguchi Yoshikazu
Department of Electrical and Electronic Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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Demura Satoshi
National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
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Fujihisa Hiroshi
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
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Miura Osuke
Department of Electrical and Electronic Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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Gotoh Yoshito
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
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Izawa Hiroki
Department of Electrical and Electronic Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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