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Anisotropic compressibility and effects of pressure on the electronic structure and Tc for superconducting infinite layer compounds

✍ Scribed by D.L. Novikov; O.N. Mryasov; A.J. Freeman

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
408 KB
Volume
219
Category
Article
ISSN
0921-4534

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✦ Synopsis

Total energy local density determinations of the effects of pressure on the (Srt_xCax h_yCuO2 infinite layer (IL) Tc ffi 110 K superconductor show, that the compressibility is highly anisotropic. Surprisingly , the energy location of the van Hove singularity (vHs) moves towards EF with pressure, thereby showing a correspondence between the number of holes (from dopants) needed to shift EF down to the vHs and the pressure needed to be applied to a fixed dopant material to achieve the best TΒ’. Some consequences for understanding the pressure effects on the Tc of the Hg superconductors and possible experiments are suggested.

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