Lattice compression and charge transfer in electron-doped L2−xCexCuO4 superconductors

✍ Scribed by J.L. García-Muñoz; M. Suaaidi; J. Fontcuberta; S. Piñol; X. Obradors

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 509 KB
• Volume: 268
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(96)00389-9

✦ Synopsis

The superconducting transition temperature has been determined in a series of L2_x_yI~yCexCu04 (L, E = La, Pr, Nd, Sm, Gd) superconducting oxides with a T' structure. Analysis of the electrical resistivity and the Seebeck coefficient has allowed us to separate, for the first time in superconducting cuprates, charge-transfer effects from the intrinsic pressure effects on the dependence of :ir e on the interatomic distances. We have found that at a constant free charge density, T c increases with increasing cell dimensions and pressure always leads to a decrease of the in-plane electron density.