IPB Colloquium by Milorad Milosevic

You are cordially invited to the IPB COLLOQUIUM which will be held in presence on Monday, 20 March 2023 at 12:00 in the “Zvonko Marić” lecture hall of the Institute of Physics Belgrade. The talk entitled

Advances in Ginzburg-Landau simulations of superconductivity

will be given by Prof. Dr. Milorad Milošević (Department of Physics, University of Antwerp, Belgium). Abstract of the talk:

While modern experimental techniques are enabling increasingly multifold studies of superconductivity, from in-situ synthesis to transport and scanning-probe measurements, the community has witnessed an increasing gap between the ab initio calculations and those on mean-field levels, and even more to the desired device modeling. At present, the only
tool able to address the needed multi-scale modelling of superconductors, nano-patterned into electronic circuitry, are the advanced Ginzburg-Landau simulations. We have recently developed a multiscale approach where first information about fermiology, vibrational modes, and electron-phonon coupling are obtained from first principles for the materials of interest, to be subsequently translated into (anisotropic) superconducting properties, that can further serve to properly parametrize mean-field models to capture the behavior of that superconductor in applied magnetic field and electric current.

In this talk, we will review our recent breakthroughs in that respect, and show some realized numerical experimentation on circuits of arbitrary shape (at advanced size and time scales), variable thickness, inhomogeneous parameters, with self-consistent account for magnetic field distribution, the electric field generated under applied current, incorporated heating effects, thus fully characterizing behavior of the superconducting condensate in nonequilibrium conditions that reveals physics behind improved or worsened performance of various realistic transport devices.