Details

Autor(en) / Beteiligte

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

Titel

Charge-induced vortex lattice instability

Ist Teil von

• Nature physics, 2011-02, Vol.7 (2), p.125-128

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• It has been predicted that superconducting vortices should be electrically charged and that this effect is particularly enhanced for high-temperature superconductors. Hall effect and nuclear magnetic resonance (NMR) experiments 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 Bi2Sr2CaCu2O8+y single crystals provide evidence for an electrostatically driven vortex lattice reconstruction with the magnitude of charge on each vortex pancake of ∼2×10−3e, depending on doping, in line with theoretical estimates.