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<p>Incorporating the effects of spin coherence transfer into the theory of spin exchange during random molecular collisions opens new perspectives for understanding the processes in this field. The&#xa0;elementary excitations of the&#xa0;collective modes - which describe the dynamics&#xa0; of the average values of the transverse magnetization components in a&#xa0;subensemble of radicals with different resonance frequencies -&#xa0;can be treated as quasi-particles. Through their interaction with the microwave field, these quasi-particles&#xa0;hybridize to form a new type of quasi-particle: spin polaritons. Theoretical studies have&#xa0;predicted the formation of spin polariton sunder strong&#xa0; microwave fields. This paper presents one more experimental evidence for the dependence of the&#xa0;spin ensemble's&#xa0;resonance frequencies on microwave power, obtained from studies of TEMPOL-15N nitroxide radical solution&#xa0;in toluene.</p>

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Confirmation of the Spin Exchange Paradigm in Diluted Solution of Nitroxide Radical: Spin Polariton Formation

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • R. B. Zaripov,
  • M. M. Bakirov,
  • I. T. Khairutdinov,
  • K. M. Salikhov

摘要

Incorporating the effects of spin coherence transfer into the theory of spin exchange during random molecular collisions opens new perspectives for understanding the processes in this field. The elementary excitations of the collective modes - which describe the dynamics  of the average values of the transverse magnetization components in a subensemble of radicals with different resonance frequencies - can be treated as quasi-particles. Through their interaction with the microwave field, these quasi-particles hybridize to form a new type of quasi-particle: spin polaritons. Theoretical studies have predicted the formation of spin polariton sunder strong  microwave fields. This paper presents one more experimental evidence for the dependence of the spin ensemble's resonance frequencies on microwave power, obtained from studies of TEMPOL-15N nitroxide radical solution in toluene.