The observation of vortices in superconductors was a major breakthrough in developing the
conceptual background for superconducting applications. Each vortex carries a flux …

We investigate zero-bias conductance peaks that arise from coalescing subgap Andreev
states, consistent with emerging Majorana zero modes, in hybrid semiconductor …

The properties of nanoscopic superconducting structures fabricated with a scanning
tunnelling microscope are reviewed, with emphasis on the effects of high magnetic fields …

Controlled trapping and guided motion of vortices via special arrangements of microholes,
so-called antidots, in YBa 2 Cu 3 O 7 films and devices is demonstrated. Resistive Hall-type …

We report on high quality local tunnel spectroscopy measurements in superconductors
using in-situ fabricated superconducting tips as counterelectrode. The experiments were …

We report on the set-up and performance of a dilution-refrigerator based spectroscopic
imaging scanning tunneling microscope. It operates at temperatures below 10 mK and in …

Anomalous critical current enhancement was observed with increasing magnetic field in
Josephson junctions based on Ge–Si core-shell nanowires. Despite the predicted …

We present scanning tunneling spectroscopy measurements at 0.1 K using tips made of Al.
At zero field, the atomic lattice and charge density wave of 2H–NbSe2 are observed, and …

A mesoscopic superconductor in the shape of a circular cone, and size of the order of the
coherence length, is investigated theoretically. The external magnetic field is applied …

Superconductors with an odd number of bands crossing the Fermi energy have topologically
protected Andreev states at interfaces, including Majorana states in one-dimensional …