We study flux penetration in a disordered type II superconductor by simulations of interacting vortices, using a Monte Carlo method for vortex nucleation. Our results show that a detailed description of the nucleation process yields a correction to the scaling laws usually associated with flux front invasion. We propose a simple model to account for these corrections.

The very special characteristic of the proximity effect in superconductor-ferromagnet systems is the damped oscillatory behavior of the Cooper pair wave function in a ferromagnet. In some sense, this is analogous to the inhomogeneous superconductivity, predicted long time ago by Larkin and Ovchinnikov (1964), and Fulde and Ferrell (1964), and constantly searched since that. After the qualitativ...

objective: serum leptin concentration reflects the body fat mass. there is controversial reports about the insulin effect on serum leptin concentration. we wanted to examine the effect of insulin therapy on serum leptin in children with new onset type i diabetes. materials and methods: this was a cross-sectional study in children's medical center on 34 children who had new onset type i dia...

We discuss quantum mechanical aspects of non abelian monopoles in relation to the phenomena of confinement and dynamical symmetry breaking. In supersymmetric theories there are three types of confining vacua have been found: (i) abelian dual superconductor; (ii) weakly-coupled nonabelian dual superconductor; and (iii) strongly-coupled, nonabelian Argyres-Douglas vacua. The last class of systems...

Topological superconductors have been predicted to host exotic bound states commonly referred to as Majorana fermions, which can encode and process quantum information non-locally, thus evading many forms of decoherence. One can engineer a topological superconductor by coupling a conventional s-wave superconductor with the helical surface states present in a topological insulator. In this talk,...

In order to clarify the influence of (the presence of) the broken time-reversal symmetry state (BTRSS) induced near the interface, tunneling conductance spectra in normal metal / dx2−y2-wave superconductor junctions are calculated on the basis of the quasiclassical Green’s function method. The spatial dependence of the pair potential in the superconductor side is determined self-consistently. W...

We investigate the superconducting phase transition in a superconductor (S)/ferromagnet (F) bilayer with Rashba spin-orbit interaction at S/F interface. This coupling produces spontaneous supercurrents flowing inside atomic-thickness region near interface, which are compensated by screening Meissner currents [Mironov and Buzdin, Phys. Rev. Lett. 118, 077001 (2017)]. In case of thin film emergen...

We report on the realization of a single-electron source, where current is transported through a single-level quantum dot (Q) tunnel coupled to two superconducting leads (S). When driven with an ac gate voltage, the experiment demonstrates electron turnstile operation. Compared to the more conventional superconductor-normal-metal-superconductor turnstile, our superconductor-quantum-dot-supercon...

The recent discovery and studies of 1144-phase compounds, e.g., CaKFe$_4$As$_4$, have attracted significant research interest. In this paper, based on the first-principles density functional calculations, we present a systematic study electronic structure recently synthetized 1144-type quaternary compound CaKRu$_4$P$_4$. We find that Ru-based possesses different from iron-based superconductors,...