Superconductivity at 30 K in the Nd2CuO4-type cuprate Tm1.83Ca0.17CuO4
1994; Elsevier BV; Volume: 230; Issue: 3-4 Linguagem: Inglês
10.1016/0921-4534(94)90855-9
ISSN1873-2143
AutoresWenjie Zhu, Yuan Yao, Xingjiang Zhou, B. Yin, Cheng Dong, Yongping Huang, Zhixin Zhao,
Tópico(s)Advanced Condensed Matter Physics
ResumoThe Nd2CuO4-type Ca-doped rare-earth cuprates R1.83Ca0.17CuO4 (R=Gd, Dy or Tm) have been synthesized under high pressure. Only that with the small ion Tm3+ and thus the short CuO bonds (1.916 Å) 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.
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