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

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

2011-06-14

arxiv.org/abs/1106.2827v1

Phys. Rev. Lett. 107, 037003 (2011)

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1103/PhysRevLett.107.037003

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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