Advances in multiscale simulations of superconducting devices

Seminario
08/05/2019
Immagine di Milorad Milosevic

Ore 15
INRIM, Edificio M
Sala Conferenze

Milorad Milosevic
Department of Physics, University of Antwerp
Visiting Professor Università di Camerino

 

Abstract

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 modelling. At present, the only tool able to address the needed multi-scale modelling of superconductors, nanopatterned 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 [1], 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, I will review our recent further breakthroughs in that respects, and show realized numerical experimentation on circuits of arbitrary shape (on advanced size and time scale), variable thickness, inhomogeneous parameters, with self-consistent account for magnetic field distribution, the electric field generated under applied current, incorporated heating effects, thus fully characterized behavior of the superconducting condensate in non-equilibrium conditions that reveals physics behind improved or worsened performance of various realistic transport devices [2-4].

References

[1] J. Bekaert et al., Phys. Rev. B 94, 144506 (2016); Phys. Rev. B 96, 094510 (2017).
[2] L. Embon et al., Nature Commun. 8, 85 (2017).
[3] J. Lombardo et al., Nanoscale 10, 1987 (2018).
[4] R. Cordoba et al., in preparation.

 

Nota biografica

Milorad Milosevic is a professor (hoogleraar) in the Department of Physics at the University of Antwerp (Belgium), where he is one of the research leaders in the NANO Center of Excellence and research group CMT (Condensed Matter Theory). He currently holds Guest Professorships at the University of Notre Dame (USA) and at the University of Camerino (Italy).

His research focuses on multiscale modeling and numerical experiments on novel and in silico functional materials on atomistic and nano-scale, for applications in low-power low-weight high-density electronics, spintronics, and magneto-optics, in collaboration with over 20 laboratories worldwide.

Ultima modifica: 12/05/2019 - 23:22