Abstract
The exchange enhancement of the electron g factor in strained InGaAs/InP heterostructures with a two-dimensional electron gas is studied. Analysis of the temperature dependence of the resistance in the minima of the Shubnikov-de Haas oscillations in perpendicular magnetic fields up to 12 T in the vicinity of the odd filling factors of the Landau levels yields the values of the effective electron Lande factor g* from −8.6 to −10.1. The experimental values are compared with the results of theoretical calculations of the g factor of quasiparticles. The calculations are performed using an eight-band k · p Hamiltonian and take into account exchange interaction in the two-dimensional electron gas. It is shown that, under the conditions of a large overlap between the spin-split Landau levels, the maximum value of the quasiparticle g factor can be attained in the vicinity of even filling factors. This is caused by the nonparabolicity of the electron dispersion relation.
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Original Russian Text © S.S. Krishtopenko, K.V. Maremyanin, K.P. Kalinin, K.E. Spirin, V.I. Gavrilenko, N.V. Baidus, B.N. Zvonkov, 2015, published in Fizika i Tekhnika Poluprovodnikov, 2015, Vol. 49, No. 2, pp. 196–203.
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Krishtopenko, S.S., Maremyanin, K.V., Kalinin, K.P. et al. Exchange enhancement of the electron g factor in strained InGaAs/InP heterostructures. Semiconductors 49, 191–198 (2015). https://doi.org/10.1134/S1063782615020141
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DOI: https://doi.org/10.1134/S1063782615020141