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© 2004 American Institute of Physics.
Possible applications of ZnSe:Cr in optoelectronics are discussed. It is shown that 2+ 2 + to 1+ 1 + photo-ionization of chromium results in efficient pumping of Cr 2+ Cr 2 + intrashell emission and in energy up-conversion from green to blue. A distinct difference in efficiency of the energy...
The experimental observations of novel behavior of the kinetic properties of a two-dimensional electron gas in the presence of microwave radiation are reviewed, and the various theoretical models that have been proposed for explaining them are described. © 2004 American Institute of Physics.
The conductivity of two-dimensional electrons under microwave irradiation at magnetic fields in the region where the usual Shubnikov–de Haas oscillations do not appear is investigated in the framework of the Boltzmann transport equation. It is shown that under such conditions the microwave...
A comprehensive study of the electrophysical properties of the semimagnetic ternary solid solution Hg 1− x Mn x Te, Hg 1 − x Mn x Te , an alternative material to Hg 1− x Cd x Te, Hg 1 − x Cd x Te , is reported. The charge-carrier scattering, optical, photoelectric, and magnetic properties...
In a two-dimensional (2D) hole system (multilayer p -Ge/Ge 1− x Si x ) p - Ge/Ge 1 − x Si x ) heterostructure with conductivity σ ≈ e 2 / h σ ≈ e 2 / h at low temperatures ( T ≈ 1.5 K) ( T ≈ 1.5 K ) a transition from the insulator phase ( d σ / d T >0) ( d σ / d T > 0 ) to a...
It is shown that in a periodic system of p p -type Ge 1− x Si x /Ge/Ge 1− x Si x Ge 1 − x Si x / Ge/Ge 1 − x Si x quantum wells having a Ge layer more than ∼ 30 nm ∼ 30 nm wide, the hole gas in each Ge layer is separated into two two-dimensional sublayers concentrated near opposite...
The process of formation of self-consistent double quantum wells (DQWs) in a wide p p -type quantum well in the presence of uniaxial strain is investigated. A feature of p p -type systems is the structure of the valence band, which consists of two branches of energy dispersion—light and heavy...
The statistical strained-tetrahedron model was developed to overcome two common assumptions of previous models: 1) a rigid undistorted ion sublattice of regular tetrahedra throughout all five configurations, and 2) a random ion distribution. These simplifying assumptions restrict the range of...
A comparative study is made of the influence of high pressures (15–50 GPa) on the conductance of the ammonium halides NH 4 X NH 4 X (X = F, ( X = F , Cl, Br) at temperatures of 77 K and above. It is found that the application of high pressure induces a phase transition which is manifested in a...
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