Charge-induced vortex lattice instability

A. M. Mounce, S. Oh, S. Mukhopadhyay, W. P. Halperin, A. P. Reyes, P. L. Kuhns, K. Fujita, M. Ishikado, S. Uchida

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

It has been predicted that superconducting vortices should be electrically charged and that this effect is particularly enhanced for high-temperature superconductors 1,2 . Hall effect and nuclear magnetic resonance (NMR) experiments 4 suggest the existence of charge accumulation in the vortex core, but the effects are small and the interpretation controversial. Here we show that the Abrikosov vortex lattice, characteristic of the mixed state of superconductors, will become unstable at a sufficiently high magnetic field if there is charge trapped on the vortex core. Our NMR measurements of the magnetic fields generated by vortices in Bi 2 Sr 2 CaCu 2 O 8+y single crystals 5 provide evidence for an electrostatically driven vortex lattice reconstruction with the magnitude of charge on each vortex pancake of ̃2× 10 -3 e, depending on doping, in line with theoretical estimates 1,6 .

Original languageEnglish (US)
Pages (from-to)125-128
Number of pages4
JournalNature Physics
Volume7
Issue number2
DOIs
StatePublished - Feb 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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