Tetragonality induced superconductivity in anti-ThCr2Si2-type RE2O2Bi (RE = rare earth) with Bi square nets

被引：11

作者：

Sei, Ryosuke ^{[1
,2
]}

Kawasoko, Hideyuki ^{[1
]}

Matsumoto, Kota ^{[1
]}

Arimitsu, Masato ^{[1
]}

Terakado, Kyohei ^{[1
]}

Oka, Daichi ^{[1
]}

Fukuda, Shintaro ^{[1
]}

Kimura, Noriaki ^{[3
,4
]}

Kasai, Hidetaka ^{[5
,6
]}

Nishibori, Eiji ^{[5
,6
]}

Ohoyama, Kenji ^{[7
]}

Hoshikawa, Akinori ^{[8
]}

Ishigaki, Toru ^{[8
]}

Hasegawa, Tetsuya ^{[2
]}

Fukumura, Tomoteru ^{[1
,9
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Sendai, Miyagi 9808578, Japan

[2] Univ Tokyo, Dept Chem, Grad Sch Sci, Tokyo 1130033, Japan

[3] Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan

[4] Tohoku Univ, Ctr Low Temp Sci, Sendai, Miyagi 9808578, Japan

[5] Univ Tsukuba, Div Phys, Fac Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[6] Univ Tsukuba, Tsukuba Res Ctr Energy Mat Sci, Fac Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[7] Ibaraki Univ, Grad Sch Sci & Engn, Tokai, Ibaraki 3191106, Japan

[8] Ibaraki Univ, Frontier Res Ctr Appl Atom Sci, Tokai, Ibaraki 3191106, Japan

[9] Tohoku Univ, Adv Inst Mat Res & Core Res Cluster, Sendai, Miyagi 9808577, Japan

来源：

DALTON TRANSACTIONS | 2020年 / 49卷 / 10期

关键词：

3-DIMENSIONAL VISUALIZATION; HALIDES;

D O I：

10.1039/c9dt04640b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report a series of layered superconductors, anti-ThCr2Si2-type RE2O2Bi (RE = rare earth), composed of electrically conductive Bi square nets and magnetic insulating RE2O2 layers. Superconductivity was induced by separating the Bi square nets as a result of excess oxygen incorporation, irrespective of the presence of magnetic ordering in RE2O2 layers. Intriguingly, the transition temperature of all RE2O2Bi including nonmagnetic Y2O2Bi was approximately scaled by unit cell tetragonality (c/a), implying a key role in the relative separation of the Bi square nets to induce superconductivity.

引用

页码：3321 / 3325

页数：5

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