An inhomogeneous superconducting ring (hollow cylinder) placed in a magnetic field is considered. It is shown that a direct voltage appears on section with lowest critical temperature when it is switched periodically from the normal state in the superconducting state and backwards, if the magnetic flux contained within the ring is not divisible by the flux quantum. The superconducting transitio...

We consider wires near a zero temperature transition between superconducting and metallic states. The critical theory obeys hyperscaling, which leads to a universal frequency, temperature, and length dependence of the conductance; quantum and thermal phase slips are contained within this critical theory. Normal (NN), superconducting (SS) and mixed (SN) leads on the wire determine distinct unive...

We report measurements of the resistance and the current-voltage characteristics of aluminum thin films which have two regions of different superconducting transition temperatures. Local suppression of the transition temperature is achieved by the use of a CF4 reactive ion-etching technique. A small gradient in the transition temperature is induced around the lithographically defined etched-une...

Single crystals of Bi2Rh3S2 and Bi2Rh3.5S2 were synthesized by solution growth, and the crystal structures and thermodynamic and transport properties of both compounds were studied. In the case of Bi2Rh3S2, a structural first-order transition at around 165 K is identified by single-crystal diffraction experiments, with clear signatures visible in resistivity, magnetization, and specific heat da...

Using a consistent quantum-mechanical treatment for the electromagnetic radiation, we theoretically investigate the magnetic spin-flip scatterings of a neutral two-level atom trapped in the vicinity of a superconducting body. We derive a simple scaling law for the corresponding spin-flip lifetime for such an atom trapped near a superconducting thick slab. For temperatures below the superconduct...

Neutron resonance spin-echo spectroscopy was used to monitor the temperature evolution of the linewidths of transverse acoustic phonons in lead across the superconducting transition temperature over an extended range of the Brillouin zone. For phonons with energies below the superconducting energy gap, a linewidth reduction of maximum amplitude was observed below . The electron-phonon contribut...

Inelastic neutron scattering was used to study the wave vector- and frequency-dependent magnetic fluctuations in single crystals of superconducting YBa2Cu3O6+x. The spectra contain several important features, including a gap in the superconducting state, a pseudogap in the normal state, and the much-discussed resonance peak. The appearance of the pseudogap determined from transport and nuclear ...

An experimental investigation has been made of the total energy distribution of electrons emitted from the surfaces, purified by field evaporation, of YBqCu,O,,, single crystals oriented in the [loo] direction at temperatures above and below superconducting transition temperature. Field electron emission spectroscopic experiments carried out at 75 K visualized the superconducting energy gap at ...

Pr1−xCaxBa2Cu3O7−δ(x ≈0.5) thin films have been grown on SrTiO3 and YSZ substrates by the pulsed laser ablation. The substrate temperature dependence of orientation and superconducting poperties were systematically studied. Good quality c and a-axis orientated films can be obtained on SrTiO3 via changing the substrate temperature solely. On YSZ, films with good c-axis orientation can be grown, ...

Scanning tunneling spectroscopy at very low temperatures on homogeneously disordered superconducting titanium nitride thin films reveals strong spatial inhomogeneities of the superconducting gap Delta in the density of states. Upon increasing disorder, we observe suppression of the superconducting critical temperature Tc towards zero, enhancement of spatial fluctuations in Delta, and growth of ...