A quantitative test of the theory of large polarons has been achieved by precise measurement of the cyclotron resonance of polarons in silver halides in magnetic fields up to 16 T. We find that a good agreement between the measurements and their theoretical interpretation is achieved by variational polaron theory, but the best quantitative agreement is achieved by a recent theory of the magnetoabsorption of polarons, based on a generalization of the Feynman polaron model.

• Received 24 December 1986

DOI:https://doi.org/10.1103/PhysRevLett.58.1471