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Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Materials Physics 2018
August 16-17, 2018
August 16-17, 2018 | London, UK
4
th
International Conference on
Condensed Matter and Materials Physics
The boundary influence upon superconducting properties of high T
c
superconductors
A N Lykov
P N Lebedev Physical Institute – RAS, Russia
T
he properties of superconducting plates with a thickness of the coherence length were investigated by numerically solving
the system of one-dimensional Ginzburg-Landau-Gor’kov (GLG) equations. The new boundary condition is applied to
the case of CuO
2
planes which are the main structural elements responsible for superconductivity in high T
c
superconductors.
Spatial dependence of the pairing potential across the thickness of the superconducting CuO
2
planes in HTSC copper oxides is
found by using the GLG theory. The potential turned out to be significantly suppressed due to an effect of non-superconducting
layers, which separate the CuO
2
planes. The temperature dependence of the effective energy gap was calculated in this work.
The bulk interaction potential in the cuprate HTSC is estimated within the framework of BCS theory. The large value of
the potential indicates the presence of a strong coupling interaction of the electrons in Cooper pairs. The effect leads to the
reduction of the critical temperature of these superconductors. So that, the number of CuO
2
planes that are within a short
distance of each other in unit cell should be increased for increasing
T
c
of the cuprate superconductors. The influence of
boundary conditions in Ginzburg-Landau theory on the critical state of superconducting layered structures was studied also in
the work by using new method for calculating the dependence of the critical current on the applied magnetic field. It has been
shown that taking into account the influence of the boundary in the calculations leads to a better agreement with experimental
data.
lykov@lebedev.ruRes. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C2-018