Pressure effects on Tc and structure in overdoped TlSr2CaCu2O7−δ

✍ Scribed by Y. Shimakawa; J.D. Jorgensen; B.A. Hunter; H. Shaked; R.L. Hitterman; Y. Kubo; T. Kondo; T. Manako; H. Takahashi; N. Mori

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 607 KB
• Volume: 253
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00457-2

✦ Synopsis

The effects of pressure on T c and structure in overdoped T1Sr2CaCu20 7_ 6 have been investigated. For superconducting samples dTc/d p is small and negative with din Told p varying from -0.016 GPa -l to -0.006 GPa -l. There is no significant difference in the lattice compressibilities for superconducting and nonsuperconducting metallic samples suggesting that they are not sensitive to differences in defect concentration or doping level. For the apical Cu-O(2) bond, in contrast, the compressibility is about three times as large as that for the c-axis lattice parameter in the nonsuperconducting sample, while it is nominally equal to the c-axis compressibility for the superconducting sample. This may imply a difference in the amount of carriers transferred into the CuO 2 plane under pressure.