Effect of half-quantum vortices on magnetoresistance of perforated superconducting films

Abstract

Recent cantilever magnetometry measurements of annular micron-size samples of Sr2RuO4 have revealed evidence for the existence of half-quantum vortices (HQVs) in this material [Jang et al. 2011]. We propose to look for HQVs in transport measurements and calculate magnetoresistance of a perforated superconducting film close to the transition temperature in the presence of HQVs. We analyze the dependence of magnetoresistance on the thermodynamic stability of HQVs which according to [Jang et al. 2011] can be varied by the application of an in-plane magnetic field and point out features which may help to identify them.

arXiv comment4 pages, 2 figures. Accepted for publication in Phys. Rev. Lett

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Cited by in corpus (9)

• Little-Parks oscillations with half-quantum fluxoid features in Sr2RuO4 micro rings
• Unconventional quantum oscillations in mesoscopic rings of spin-triplet superconductor Sr2RuO4
• Stabilizing fractional vortices in multiband superconductors with periodic pinning arrays
• Global room-temperature superconductivity in graphite
• Magnetoresistance oscillation study of the half-quantum vortex in doubly connected mesoscopic superconducting cylinders of Sr2RuO4
• Fractional Flux Quantization in Loops of Unconventional Superconductors
• Integer and fractionalized vortex lattices and off-diagonal long-range order
• Theory of the Little-Parks effect in spin-triplet superconductors
• Half-quantum flux in spin-triplet superconducting rings with bias current