Flux quantization in double layer exciton superfluids
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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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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

  • Quantization of circular currents


Superfluid theory II

  • Magnetic field induces current

  • Current induces magnetic field

  • Diamagnetism in between layers

Be

j

Bi

j


Flux Quantization


Quantization: Realizable?

  • Phase slip effect

  • Phase pinning

  • Numbers


Realization: Oxides

Prof. Hans Hilgenkamp(University of Twente)


Realization: Graphene


Conclusion

  • Double layer exciton superfluid acts as a diamagnet

  • Ring-shaped structure gives unconventional flux quantization

  • Realizable with oxides or graphene


Thanks to …

Prof. Hans Hilgenkamp(University of Twente)

Prof. Jan Zaanen(Lorentz Institute, Leiden)

… and you for your attention!


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