Effects of resonant polarons and band nonparabolicity on cyclotron resonance in n-InP - art. no. 115201

We study the effects of resonant polarons and band nonparabolicity on the c yclotron resonance of conduction electrons in n-InP at 4.2 K in the far-inf rared regions. By combining photo- and electric field-excitation techniques , we successfully separate and estimate the individual contributions of res onant polarons and band nonparabolicity to the resonance magnetic field of the cyclotron resonance. In analyses of the experimental results obtained b y use of the electric field excitation technique, we take into consideratio n the energy redistribution of conduction electrons by the electric field e xcitation. Those resonance magnetic fields are revised to the values for co nduction electrons populating the bottoms of Landau levels, on the basis of the experimental results obtained by use of the photoexcitation technique. The dispersion of the resonance magnetic field is fitted by theoretical ca lculations using the improved Wigner-Brillouin perturbation theories by Lin demann et al. and the three-band k . p method by Lax. The conduction-band-e dge mass m(eo) and the polaron coupling constant a are used as fitting para meters. Excellent agreement between the experimental and theoretical result s is obtained. We determine m(eo)/m(fe) = 0.0788 (m(fe) is the free-electro n mass) and alpha = 0.12 for InP.