The current-phase relationship has been measured as a function of temperature for niobium nanobridges with different widths. A deformation from Josephson-like sinusoidal characteristics at high temperatures to sawtooth shaped curves at intermediate and multivalued relationships at low temperatures was observed. Based on this, possible hysteresis in the current-voltage characteristics of niobium nanobridge superconducting quantum interference devices can be attributed to phase slippage.
|Journal||Physical review B: Condensed matter and materials physics|
|Publication status||Published - 2008|
Troeman, A. G. P., van der Ploeg, S. H. W., IlÍchev, E., Meyer, H. G., Golubov, A. A., Kupriyanov, M. Y., & Hilgenkamp, J. W. M. (2008). Temperature dependence measurements of the supercurrent-phase relationship in niobium nanobridges. Physical review B: Condensed matter and materials physics, 77(2), 024509-. https://doi.org/10.1103/PhysRevB.77.024509