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Flux Quantization in Double Layer Exciton Superfluids

Flux Quantization in Double Layer Exciton Superfluids. Louk Rademaker, Arnemuiden 16 June 2010. Overview. What are double layer excitons? Exciton superfluid theory Flux quantization Experimental realization. Double layer excitons. Superfluid theory I. Order parameter

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Flux Quantization in Double Layer Exciton Superfluids

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  1. Flux Quantization in Double Layer Exciton Superfluids Louk Rademaker, Arnemuiden 16 June 2010

  2. Overview • What are double layer excitons? • Exciton superfluid theory • Flux quantization • Experimental realization

  3. Double layer excitons

  4. Superfluid theory I • Order parameter • Quantization of circular currents

  5. Superfluid theory II • Magnetic field induces current • Current induces magnetic field • Diamagnetism in between layers Be j Bi j

  6. Flux Quantization

  7. Quantization: Realizable? ✔ • Phase slip effect • Phase pinning • Numbers ✔ ✔

  8. Realization: Oxides Prof. Hans Hilgenkamp(University of Twente)

  9. Realization: Graphene

  10. Conclusion • Double layer exciton superfluid acts as a diamagnet • Ring-shaped structure gives unconventional flux quantization • Realizable with oxides or graphene

  11. Thanks to … Prof. Hans Hilgenkamp(University of Twente) Prof. Jan Zaanen(Lorentz Institute, Leiden) … and you for your attention!

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