Abstract The challenge underlying superconducting quantum computing is to remove materials bottleneck for highly coherent devices. nonuniformity and complex structural components in the circuits often lead local electric field concentration, charge scattering, dissipation ultimately decoherence. Here we visualize interface dipole heterogeneous distribution of individual Al/AlO x /Al junctions e...

We describe a biasing scheme for single-photon detectors based on superconducting tunnel junctions. It replaces a single detector junction with a circuit of three junctions and achieves biasing of a detector junction at subgap currents without the use of an external magnetic field. The biasing occurs through the nonlinear interaction of the three junctions, which we demonstrate through numerica...

We calculate the quantum correction to the classical conductance of a disordered mesoscopic normal-superconducting (NS) junction in which the electron spatial and

We introduce Weyl Josephson circuits: small junction circuits that simulate band structures. first formulate a general approach to design are analogous Bloch Hamiltonians of desired dimensionality and symmetry class. then construct analyze six-junction device produces three-dimensional (3D) Hamiltonian with broken inversion in which topological phase transitions can be triggered situ. argue cur...

A recent study have shown that it is possible to enhancement, in contrast an expected suppression, tunneling density of states (TDOS) a Luttinger liquid (LL) which solely driven by the non-local density-density interactions. Also, well known LL proximity superconductor (SC) shows enhancement TDOS vicinity junction zero energy limit. In this paper, we interplay nonlocal interaction and supercond...

The coupling of two s-wave superconductors through a small magnetic dot is discussed. Assuming that the dot charging energy is small compared to the superconducting gap, Ec D, and that the moment of the dot is classical, we develop a simple theory of transport through the dot. The presence of the magnetic dot will position Andreev bound states within the superconducting gap at energies tunable ...

We consider theoretically a Josephson junction with a superconducting critical current density which has a random sign along the junction's surface. We show that the ground state of the junction corresponds to the phase difference equal to π 2. Such a situation can take place in superconductor-ferromagnet-superconductor junctions.

Topological insulator-based Josephson junction, as a candidate device for searching Majorana zero energy modes, has attracted much attention. One of the key issues along this direction is to fabricate junctions with high-quality interfaces, hoping 4π-period current-phase relation in topologically non-trivial junction. In work, based on three-dimensional topological insulator nanowires Bi<sub...

The interaction between superconducting and spin-polarized orders has recently emerged as a major research field following a series of fundamental breakthroughs in charge transport in superconductor-ferromagnet heterodevices which promise new device functionality. Traditional studies which combine spintronics and superconductivity have mainly focused on the injection of spin-polarized quasipart...

We report the fabrication of a van der Waals tunneling device hosting defect-bound quantum dot coupled to NbSe$_2$. find that upon application magnetic field, exhibits zero-bias conductance peak. The peak, which splits at higher fields, is associated with Kondo effect. At same time, junction retains conventional quasiparticle features finite bias. Such coexistence superconducting gap and effect...