LANDAU-SPLIT AND SPIN-SPLIT CYCLOTRON-RESONANCE OF 2-DIMENSIONAL ELECTRON-SYSTEMS IN HGTE QUANTUM-WELLS

Cyclotron resonances of high-mobility electrons in inverted semiconduc ting type HgTe quantum wells were investigated at liquid helium temper atures by far-infrared Fourier transform spectroscopy. Due to the ener gy dependence of the electron effective mass and the high electron mob ilities in excess of 70 000 cm(2) V(-1)s(-1), the spin-splitting and t he Landau-splitting of the cyclotron resonance could be resolved. At t he conduction subband edge an effective mass m(0) approximate to 0.01 6 m(e) and a Lande g-factor \g(0)\ approximate to 20 was obtained. The experiment is in good agreement with predictions based on the single- particle approximation.