Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B47: One and Two Dimensional Superconductivity-1
11:30 AM–2:30 PM,
Monday, March 15, 2021
Sponsoring
Unit:
DCMP
Chair: Michael Susner, Air Force Research Lab - WPAFB
Abstract: B47.00015 : Tunable Flux Vortices in 2D Dirac Superconductors*
2:18 PM–2:30 PM
Live
Presenter:
Sina Zeytinoglu
(Harvard University)
Authors:
Sina Zeytinoglu
(Harvard University)
Atac Imamoglu
(Physics, ETH Zurich)
Sebastian Huber
(Physics, ETH Zurich)
for both non-interacting and interacting systems. Yet, our understanding of the relationship
between geometrical effects in non-interacting systems and their interacting counterparts is far from
complete. Here, we demonstrate how the single-particle Berry curvature associated with the normal
phase in two-dimensions modifies the fluxoid quantization of a Bardeen-Cooper-Schrieffer (BCS)
superconductor. Ideally, the magnetic flux enclosed inside a single vortex can be continuously
tuned between one and zero flux quantum. A discussion of the experimental scenarios where this
anomalous quantization is expected is provided. Our work demonstrates the importance of variational
ansatze in making a clear connection between the Berry phases of single-particle and many-body
wavefunctions.
*This work is supported by a European Research Council (ERC) Advanced investigator grant (POLTDES),
Consolidator grant (TopMechMat), and the Swiss National Science Foundation through Grant No. P2EZP2_184320
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