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

Mergenthaler, M and Liu, Junjie and Le Roy, Jennifer J and Ares, N and Thompson, Amber L and Bogani, L. and Ardavan, A and Briggs, G. Andrew D. and Leek, P J and Laird, E A (2017) Strong Coupling of Microwave Photons to Antiferromagnetic Fluctuations in an Organic Magnet. Physical review letters, 119 (14). ISSN 0031-9007

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2017 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
124388
Deposited By:
Deposited On:
05 Apr 2018 15:10
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 07:41