101 research outputs found
Phenomenological correlations in high-temperature superconductors
An interpretation of the quadratic parameter of the Ginzburg-Landau theory of
superconductivity is presented in this paper. The negative term in the
potential, which allows the spontaneous symmetry breaking, is interpreted as a
direct contribution from the energy gap at the Fermi surface to the effective
potential. As a result, in the London approximation of the Ginzburg-Landau
theory for type-II superconductors, a strong correlation is predicted and
observed between the upper critical field at zero kelvin and the critical
temperature in high temperature superconductors.Comment: 4 pages, 2 figure
- …