Mergenthaler Matthias, Liu Junjie, Le Roy Jennifer J, Ares Natalia, Thompson Amber L, Bogani Lapo, Luis Fernando, Blundell Stephen J, Lancaster Tom, Ardavan Arzhang, Briggs G Andrew D, Leek Peter J, Laird Edward A
Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom.
Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom.
Phys Rev Lett. 2017 Oct 6;119(14):147701. doi: 10.1103/PhysRevLett.119.147701. Epub 2017 Oct 2.
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.
在电路量子电动力学（电路QED）架构中，研究了二（苯基）-（2,4,6-三硝基苯基）亚氨基氮自由基晶体与超导微波谐振器之间的耦合。该晶体在4K以上表现出顺磁行为，在该温度以下出现反铁磁关联，并且我们在基温下证明了强耦合。随着晶体冷却，磁共振获得场角依赖性，表明交换相互作用的各向异性。这些结果表明，有机晶体中的多自旋模式适用于电路QED，为其相干操纵提供了一个平台。它们还利用电路QED架构作为探测低温下自旋关联的一种方法。
