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  • PhysRevLett.119.147701

    Rights statement: © 2017 American Physical Society

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Strong Coupling of Microwave Photons to Antiferromagnetic Fluctuations in an Organic Magnet

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  • M Mergenthaler
  • Junjie Liu
  • Jennifer J Le Roy
  • N Ares
  • Amber L Thompson
  • L. Bogani
  • A Ardavan
  • G. Andrew D. Briggs
  • P J Leek
  • E A Laird
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Article number147701
<mark>Journal publication date</mark>2/10/2017
<mark>Journal</mark>Physical review letters
Issue number14
Volume119
Number of pages6
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Coupling between a crystal of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium radicals and a superconducting microwave resonator is investigated in a circuit quantum electrodynamics (circuit QED) architecture. The crystal exhibits paramagnetic behavior above 4 K, with antiferromagnetic correlations appearing below this temperature, and we demonstrate strong coupling at base temperature. The magnetic resonance acquires a field angle dependence as the crystal is cooled down, indicating anisotropy of the exchange interactions. These results show that multispin modes in organic crystals are suitable for circuit QED, offering a platform for their coherent manipulation. They also utilize the circuit QED architecture as a way to probe spin correlations at low temperature.

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© 2017 American Physical Society