Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry
Jonathan B. Curtis, Nikola Maksimovic, Nicholas R. Poniatowski, Amir Yacoby, Bertrand I. Halperin, Prineha Narang, Eugene Demler
Abstract
Understanding the dynamics of vortices in superconductors is crucial in two dimensions, since these materials are expected to undergo a topological Berezinskii-Kosterlitz-Thouless (BKT) phase transition. It has remained challenging, however, to directly fingerprint this transition and the associated vortex dynamics. Here, the authors show that spin qubit noise magnetometry can potentially detect signatures of the BKT transition via its impact on the magnetic flux noise emanating from the sample as a function of frequency, temperature, and distance.
Topics & Concepts
MagnetometerCondensed matter physicsSuperconductivityVortexKosterlitz–Thouless transitionPhysicsPhase transitionNoise (video)Magnetic fluxMagnetic fieldQuantum mechanicsMechanicsArtificial intelligenceImage (mathematics)Computer sciencePhysics of Superconductivity and MagnetismTopological Materials and PhenomenaAdvanced Condensed Matter Physics