Year: 2023
Type: preprint
Abstract: We present a comprehensive investigation of the Berezinskii-Kosterlitz-Thouless (BKT) transition in ultrathin strongly disordered NbN films. Measurements of resistance, current-voltage characteristics and kinetic inductance on the very same device reveal a consistent picture of a sharp unbinding transition of vortex-antivortex pairs that fit standard renormalization group theory without extra assumptions in terms of inhomogeneity. Our experiments demonstrate that the previously observed broadening of the transition is not an intrinsic feature of strongly disordered superconductors and provide a clean starting point for the study of dynamical effects at the BKT transition.
Source: arXiv (Cornell University)
Authors: Weitzel, Alexander, Pfaffinger, Lea, Maccari, Ilaria, Kronfeldner, Klaus, Huber, Thomas, Fuchs, Lorenz, Mallord, James, Linzen, Sven, Il'ichev, Evgeni, Paradiso, Nicola, Strunk, Christoph
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4330338973