Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Nov 3;131(18):186002.
doi: 10.1103/PhysRevLett.131.186002.

Sharpness of the Berezinskii-Kosterlitz-Thouless Transition in Disordered NbN Films

Alexander Weitzel  1 , Lea Pfaffinger  1 , Ilaria Maccari  2 , Klaus Kronfeldner  1 , Thomas Huber  1 , Lorenz Fuchs  1 , James Mallord  1 , Sven Linzen  3 , Evgeni Il'ichev  3 , Nicola Paradiso  1 , Christoph Strunk  1
Affiliations

Sharpness of the Berezinskii-Kosterlitz-Thouless Transition in Disordered NbN Films

Alexander Weitzel et al. Phys Rev Lett. .

Abstract

We present a comprehensive investigation of the Berezinskii-Kosterlitz-Thouless 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 Berezinskii-Kosterlitz-Thouless transition.

PubMed Disclaimer

LinkOut - more resources