Pressure effects T{sub c} and structure in overdoped TlSr{sub 2}CaCu{sub 2}O{sub 7-{delta}}.
The effects of pressure on {Tc} and structure in overdoped TlSr{sub 2}CaCu{sub 2}O{sub 7-{delta}} have been investigated. For superconducting samples dT{sub c}/dp is small and negative with d ln {Tc}/dp varying from {approx}0.016 GPa{sup -1} to {approx}0.006 GPa{sup -1}. 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 simple, 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{sub 2} plane under pressure.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 937765
- Report Number(s):
- ANL/MSD/JA-18384
- Journal Information:
- Physica C, Journal Name: Physica C Journal Issue: 1-2 ; Oct. 20, 1995 Vol. 253; ISSN 0921-4534; ISSN PHYCE6
- Country of Publication:
- United States
- Language:
- ENGLISH
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