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arXiv · 1106.2827

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

Victor Vakaryuk·Valerii Vinokur
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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.

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Victor Vakaryuk, Valerii Vinokur. 2011-06-14. Effect of half-quantum vortices on magnetoresistance of perforated superconducting films. https://doi.org/10.1103/physrevlett.107.037003

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