Magnetopolaron effect on shallow indium donors in CdTe

Abstract

The far-infrared photoconductivity technique is applied to study the energy spectrum of shallow indium donors in CdTe layers grown by molecular-beam epitaxy. Accurate experimental data are obtained throughout the energy range relevant to study the resonant polaron effect, including the reststrahlen band. A detailed comparaison of the measured 1s→2 p ϩ transition energies is made with the predictions of a variational calculation, in which the electron-phonon interaction is treated as a second-order perturbation. An overall good agreement is found between experiment and theory with the material parameters found in the literature. This gives a Fröhlich coupling constant ␣ϭ0.286.

Cyclotron resonance in II–VI semiconductors at THz region

“…The observation of the spin splitting CR indicates that the sample quality is high. The averaged effective mass is obtained m* = 0.098m 0 , and it is slightly heavier than the band edge mass [8]. Below T = 80 K, additional resonances are observed at lower magnetic field side of the CRs around B = 90 T. The absorption peak is assigned as ICR, and the ICR also found to consist of two peaks.…”

Magnetized Plasma in Polar Semiconductors

“…Experiments were performed in a wide range of magnetic fields up to 28 T, which cover the limit of cyclotron frequency exceeding the LO frequency of the insulating material. These studies are complementary to the more common, far-infrared absorption investigations of such effects [10][11][12][13][14][15][16][17]. However, the latter experiments probe the transverse plasma excitations which, in addition, are characterized by very small k-vectors provided by far infrared light.…”

Terahertz Response of a Point Contact Based on CdTe/CdMgTe Quantum Well in Magnetic Field

“…Here the fundamental plasmonic resonance energies are depicted by symbols, the CR energy by a solid line, the shallow impurity transition energy in bulk E 1s→2p + [13] by dashed lines and the E 1s→2p + /4 by dash-dotted lines.…”