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Tetragonality induced superconductivity in anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth) with Bi square net

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Title: Tetragonality induced superconductivity in anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth) with Bi square net
Authors: Sei, Ryosuke, Kawasoko, Hideyuki, Matsumoto, Kota, Arimitsu, Masato, Terakado, Kyohei, Oka, Daichi, Fukuda, Shintaro, Kimura, Noriaki, Kasai, Hidetaka, Nishibori, Eiji, Ohoyama, Kenji, Hoshikawa, Akinori, Ishigaki, Toru, Hasegawa, Tetsuya, Fukumura, Tomoteru
Source: Dalton Trans. 49, 3321-3325 (2020)
Publication Year: 2020
Collection: Condensed Matter
Subject Terms: Condensed Matter - Superconductivity, Condensed Matter - Materials Science
More Details: We report a series of layered superconductors, anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth), composed of electrically conductive Bi square nets and magnetic insulating $RE_2$O$_2$ layers. The superconductivity was induced by separating Bi square nets as a result of excess oxygen incorporation, irrespective of the presence of magnetic ordering in $RE_2$O$_2$ layers. Intriguingly, the transition temperature of all $RE_2$O$_2$Bi including nonmagnetic Y$_2$O$_2$Bi was approximately scaled by the unit cell tetragonality ($c$/$a$), implying a key role of relative separation of the Bi square nets to induce the superconductivity.
Document Type: Working Paper
DOI: 10.1039/C9DT04640B
Access URL: http://arxiv.org/abs/2003.05598
Accession Number: edsarx.2003.05598
Database: arXiv
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  Data: Tetragonality induced superconductivity in anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth) with Bi square net
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  Data: <searchLink fieldCode="AR" term="%22Sei%2C+Ryosuke%22">Sei, Ryosuke</searchLink><br /><searchLink fieldCode="AR" term="%22Kawasoko%2C+Hideyuki%22">Kawasoko, Hideyuki</searchLink><br /><searchLink fieldCode="AR" term="%22Matsumoto%2C+Kota%22">Matsumoto, Kota</searchLink><br /><searchLink fieldCode="AR" term="%22Arimitsu%2C+Masato%22">Arimitsu, Masato</searchLink><br /><searchLink fieldCode="AR" term="%22Terakado%2C+Kyohei%22">Terakado, Kyohei</searchLink><br /><searchLink fieldCode="AR" term="%22Oka%2C+Daichi%22">Oka, Daichi</searchLink><br /><searchLink fieldCode="AR" term="%22Fukuda%2C+Shintaro%22">Fukuda, Shintaro</searchLink><br /><searchLink fieldCode="AR" term="%22Kimura%2C+Noriaki%22">Kimura, Noriaki</searchLink><br /><searchLink fieldCode="AR" term="%22Kasai%2C+Hidetaka%22">Kasai, Hidetaka</searchLink><br /><searchLink fieldCode="AR" term="%22Nishibori%2C+Eiji%22">Nishibori, Eiji</searchLink><br /><searchLink fieldCode="AR" term="%22Ohoyama%2C+Kenji%22">Ohoyama, Kenji</searchLink><br /><searchLink fieldCode="AR" term="%22Hoshikawa%2C+Akinori%22">Hoshikawa, Akinori</searchLink><br /><searchLink fieldCode="AR" term="%22Ishigaki%2C+Toru%22">Ishigaki, Toru</searchLink><br /><searchLink fieldCode="AR" term="%22Hasegawa%2C+Tetsuya%22">Hasegawa, Tetsuya</searchLink><br /><searchLink fieldCode="AR" term="%22Fukumura%2C+Tomoteru%22">Fukumura, Tomoteru</searchLink>
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  Data: Dalton Trans. 49, 3321-3325 (2020)
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  Data: 2020
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  Data: Condensed Matter
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  Data: <searchLink fieldCode="DE" term="%22Condensed+Matter+-+Superconductivity%22">Condensed Matter - Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Condensed+Matter+-+Materials+Science%22">Condensed Matter - Materials Science</searchLink>
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  Data: We report a series of layered superconductors, anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth), composed of electrically conductive Bi square nets and magnetic insulating $RE_2$O$_2$ layers. The superconductivity was induced by separating Bi square nets as a result of excess oxygen incorporation, irrespective of the presence of magnetic ordering in $RE_2$O$_2$ layers. Intriguingly, the transition temperature of all $RE_2$O$_2$Bi including nonmagnetic Y$_2$O$_2$Bi was approximately scaled by the unit cell tetragonality ($c$/$a$), implying a key role of relative separation of the Bi square nets to induce the superconductivity.
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  Data: 10.1039/C9DT04640B
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  Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2003.05598" linkWindow="_blank">http://arxiv.org/abs/2003.05598</link>
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  Data: edsarx.2003.05598
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      – TitleFull: Tetragonality induced superconductivity in anti-ThCr$_2$Si$_2$-type $RE_2$O$_2$Bi ($RE$ = rare earth) with Bi square net
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