http://dspace.nbuv.gov.ua:80/handle/123456789/129041 2026-04-24T06:03:07Z 2026-04-24T06:03:07Z de Bruyn Ouboter, R. Omelyanchouk, A.N. http://dspace.nbuv.gov.ua:80/handle/123456789/129539 2018-01-20T01:04:42Z 2017-01-01T00:00:00Z

On massive photons inside a superconductor as follows from London and Ginzburg–Landau theory de Bruyn Ouboter, R.; Omelyanchouk, A.N. A phenomenological derivation in the frame of London's and Ginzburg-Landau theories is given that photons behave inside a superconductor as if they have mass.

2017-01-01T00:00:00Z Kornev, V.K. Kolotinskiy, N.V. Sharafiev, A.V. Soloviev, I.I. http://dspace.nbuv.gov.ua:80/handle/123456789/129538 2018-01-20T01:05:40Z 2017-01-01T00:00:00Z

From single SQUID to superconducting quantum arrays Kornev, V.K.; Kolotinskiy, N.V.; Sharafiev, A.V.; Soloviev, I.I. Superconducting quantum arrays (SQAs) capable of providing highly linear voltage response to magnetic signal and high dynamic range have been suggested and developed. Base elements of the arrays, quantum cells, were devised and studied in detail. Using niobium process, SQAs with different number of the cells and prototypes of the SQA-based broadband active electrically small antennas were fabricated and tested.

2017-01-01T00:00:00Z Rahmonov, I.R. Shukrinov, Yu.M. Dawood, R. El Samman, H. http://dspace.nbuv.gov.ua:80/handle/123456789/129537 2018-01-20T01:04:27Z 2017-01-01T00:00:00Z

Determination of Cooper pairs and Majorana fermions currents ratio in dc SQUID with topologically nontrivial barriers Rahmonov, I.R.; Shukrinov, Yu.M.; Dawood, R.; El Samman, H. We present the results of numerical study of the phase dynamics of the dc SQUID with topologically trivial and nontrivial barriers. In our calculations we take into account two components of superconducting current, Cooper pairs (2π periodic) and Majorana fermions (4π periodic) currents. Magnetic field dependence of return current is presented. The qualitative behavior of this dependence is explained. We show that in case of two-component superconducting current the periodicity of magnetic field dependence of return current displaced by Cooper pairs and Majorana fermion ratio over the magnetic field. This effect makes possible the experimental determination of ratio of Cooper pairs and Majorana fermions currents.

2017-01-01T00:00:00Z Massarotti, D. Stornaiuolo, D. Lucignano, P. Caruso, R. Galletti, L. Montemurro, D. Jouault, B. Campagnano, G. Arani, H.F. Longobardi, L. Parlato, L. Pepe, G.P. Rotoli, G. Tagliacozzo, A. Lombardi, F. Tafuri, F. http://dspace.nbuv.gov.ua:80/handle/123456789/129536 2018-01-20T01:05:32Z 2017-01-01T00:00:00Z

What happens in Josephson junctions at high critical current densities Massarotti, D.; Stornaiuolo, D.; Lucignano, P.; Caruso, R.; Galletti, L.; Montemurro, D.; Jouault, B.; Campagnano, G.; Arani, H.F.; Longobardi, L.; Parlato, L.; Pepe, G.P.; Rotoli, G.; Tagliacozzo, A.; Lombardi, F.; Tafuri, F. The impressive advances in material science and nanotechnology are more and more promoting the use of exotic barriers and/or superconductors, thus paving the way to new families of Josephson junctions. Semiconducting, ferromagnetic, topological insulator and graphene barriers are leading to unconventional and anomalous aspects of the Josephson coupling, which might be useful to respond to some issues on key problems of solid state physics. However, the complexity of the layout and of the competing physical processes occurring in the junctions is posing novel questions on the interpretation of their phenomenology. We classify some significant behaviors of hybrid and unconventional junctions in terms of their first imprinting, i.e., current-voltage curves, and propose a phenomenological approach to describe some features of junctions characterized by relatively high critical current densities Jc. Accurate arguments on the distribution of switching currents will provide quantitative criteria to understand physical processes occurring in high- Jc junctions. These notions are universal and apply to all kinds of junctions.

2017-01-01T00:00:00Z