منابع مشابه
Phase slips in superconducting films with constrictions
A system of two coplanar superconducting films seamlessly connected by a bridge is studied. We observe two distinct resistive transitions as the temperature is reduced. The first one, occurring in the films, shows some properties of the Berezinskii-Kosterlitz-Thouless (BKT) transition. The second apparent transition (which is in fact a crossover) is related to freezing out of thermally activate...
متن کاملControlling hysteresis in superconducting constrictions with a resistive shunt
We demonstrate control of the thermal hysteresis in superconducting constrictions by adding a resistive shunt. In order to prevent thermal relaxation oscillations, the shunt resistor is placed in close vicinity of the constriction, making the inductive current-switching time smaller than the thermal equilibration time. We investigate the current-voltage characteristics of the same constriction ...
متن کاملTheory of AC Josephson Effect in Superconducting Constrictions
We have developed a microscopic theory of ac Josephson effect in short ballistic superconducting constrictions with arbitrary electron transparency, and constrictions with diffusive electron transport. As applications of the theory we study smearing of the subgap current singularities by pair-breaking effects in the superconducting electrodes of the constriction, and the structure of these sing...
متن کاملPhase slips and vortex-antivortex pairs in superconducting films with constrictions
A system of two thin coplanar superconducting films seamlessly connected by a bridge is studied. When such a system is cooled, two distinct resistive transitions are observed. The first one is identified with the Berezinskii-Kosterlitz-Thouless (BKT) transition in the film, whereas the second one is a crossover related to the quenching of thermally activated phase slips (TAPS) occurring on the ...
متن کاملPharyngeal constrictions.
From a fiberscope, the tip of which was swung from left to right in the pharynx, cinefilm frames were obtained which showed the cross-sectional shape of pharyngeal constrictions in back vowels. This information was combined with the information offered by X-ray pictures of the same subject phonating the same vowels on a different occasion. The results agree to a reasonable extent with previousl...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1998
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.58.11173