Abstract
The oscillatory absorption edge spectrum of thin InSb crystals in which the discrete structure of the Wannier-Mott exciton had been revealed at H=0 for the first time has been studied at 1.8 K in magnetic fields of up to 80 kOe. The experimental data were analyzed with a computer taking into account the exciton nature of the phenomenon and the effect on the Landu levels of the nonlocality of potential resulting from the electron-electron exchange interaction. A set of band parameters has been obtained providing a minimum discrepancy between the theoretical and experimental spectra by not more than 0.65 meV per point: E p = 23.42 eV, F = -1.18, N 1 = -0.33, r 1 = 36.41, r 2 = 15.95, r 3 = 16.99, r = 15.22, q = 0.31 for h = 17.9 . The reasons for and the extent of discrepancy between the InSb parameters derived by other authors from interband magnetoabsorption experiments are discussed.
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