6 research outputs found
Vortex phases in mesoscopic cylinders with suppressed surface superconductivity
Vortex structures in mesoscopic cylinder placed in external magnetic field
are studied under the general de Gennes boundary condition for the order
parameter corresponding to the suppression of surface superconductivity. The
Ginzburg-Landau equations are solved based on trial functions for the order
parameter for vortex-free, single-vortex, multivortex, and giant vortex phases.
The equilibrium vortex diagrams in the plane of external field and cylinder
radius and magnetization curves are calculated at different values of de Gennes
"extrapolation length" characterizing the boundary condition for the order
parameter. The comparison of the obtained variational results with some
available exact solutions shows good accuracy of our approach.Comment: RevTex, 11 pages, 10 figure
On the Effect of Boundary Conditions in the Ginzburg–Landau Theory on the Results of Calculations of the Critical State of Layered Structures
Electroless porous silicon formation applied to fabrication of boron-silica-glass cantilevers
In Memoriam Leonid V. Keldysh
Leonid Keldysh -- one of the most influential theoretical physicists of the
20th century -- passed away in November 2016. Keldysh is best known for the
diagrammatic formulation of real-time (nonequilibrium) Green functions theory
and for the theory of strong field ionization of atoms. Both theories
profoundly changed large areas of theoretical physics and stimulated important
experiments. Both these discoveries emerged almost simultaneously -- like
Einstein, also Keldysh had his \textit{annus mirabilis} -- the year 1964. But
the list of his theoretical developments is much broader and is briefly
reviewed here