Abstract
The electronic state of excitons and their phonon coupling in high magnetic field are investigated by optical means in thallous halides. By the study of an 1s exciton in a magnetic field, inter-as well as intra-valley scatterings are found to play an important role in the internal structure of the exciton. For the hydrogen-like exciton envelope state, it is demonstrated that the energy shift by magnetic field differs considerably from what is expected from available theories. Experimental evidence of the polaron-induced anomaly of exciton is given and its peculiar behavior is discussed.
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