An unconventional vortex state in a superconducting bilayer where one layer has a hole. (September 2018)

• Record Type: Journal Article
• Authors: Tanaka, Y.; Yamamori, H.; Yanagisawa, T.; Nishio, T.; Arisawa, S.
• Is Part Of: Solid state communications. Volume 277(2018)
• Page Start: 39
• Page End: 44
• Publication Date: 2018-09
• Subjects: A. Multi-component superconductor -- B. Fractional quantisation -- C. An ultrathin superconducting bilayer -- D. Phase difference soliton; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.04.012
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: An ultrathin superconducting bilayer creates a coreless fractional vortex when only the second layer has a hole. The quantization is broken by the hole, and the normal core disappears. The magnetic flux is no longer confined near the normal core. The divergence of the magnetic flux density is truncated around the center. We propose basic design of a practical device to realize a coreless fractional vortex. Highlights: A coreless fractional vortex appears in a superconducting bi-layer when we make a hole in one layer. It appears at the edge of the hole. Structuring one layer locally, one can invoke some non-trivial vortex states.