Superconductivity at 30 K in the Nd2CuO4-type cuprate Tm1.83Ca0.17CuO4

✍ Scribed by W.J. Zhu; Y.S. Yao; X.J. Zhou; B. Yin; C. Dong; Y.Z. Huang; Z.X. Zhao

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 254 KB
• Volume: 230
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90855-9

✦ Synopsis

The Nd2CuO4-type Ca-doped rare-earth cuprates R t.s3Cao.~TCUO4 (R = Gd, Dy or Tm) have been synthesized under high pressure. Only that with the small ion Tm 3+ and thus the short Cu-O bonds ( 1.916 A) was superconducting (at about 30 K). This was considered to be the first example of p-type superconductivity in the purely square-planar CuO2 layers without apical oxygens.