Numerical and analytical results of studying the effect of size quantization of single-particle entropy in a two-dimensional electron gas in semiconductor materials with a nonparabolic conduction band are presented. The dependence of the one-particle entropy on the chemical potential of the gas at resonance point and far from it is analyzed. It is shown that at low temperatures the nonparabolicity of the band gives a small correction to the single-particle entropy. Both at the resonance point and far from it, this correction is proportional to the product of the nonparabolic coefficient and the temperature αT. The influence of the broadening of spatial quantization levels on the single-particle entropy is estimated numerically. The results obtained are presented for different temperatures, the degree of nonparabolicity of the conduction band, and the magnitude of the broadening.
| Mualliflar | Gulyamov, G., Абдулазизов, Б.Т., Тохиржонов, М.С. |
|---|---|
| Jurnal | O‘zbekiston fizika jurnali |
| Nashr sanasi | 2021-12-24 |
| Jild | 23 |
| Son | 4 |
| Til | Rus |
| DOI | 10.52304/.v23i4.284 |
DOI: 10.52304/.v23i4.284 · Maqolaning asl sahifasi
гетероструктуры, квантовая яма, пространственное квантование, двумерный электронный газ, вырожденный Ферми газ, химический потенциал, энергия Ферми, узкозонные полупроводники, зоны непараболичности, фазовый переход, одночастичная энтропия, минизоны, heterostructure, quantum well, size quantization, two-dimensional electron gas, degenerated Fermi gas, сhemical рotential, Fermi energy, single particle entropy, mini-bands, narrow band semiconductors, band nonparabolicity, phase transition
A nonadiabatic collective model of nonaxial even-even nuclei with quadrupole and octupole deformations is developed. Transverse quadrupole and octupole deformations are taken into account effectively. And longitudinal…
Matrix elements of three- and four-photon optical transitions occurring between the subbandsof the valence band of semiconductor of cubic symmetry are calculated. In this case, the contribution of the simultaneous…
The effect of multiple exciton generation in low dimensional nanostructures by a single photon presents a possible route to improved photovoltaic conversion efficiency. In this work, the Fermi`s statistical theory of…
Recently, we have derived an approximate analytic formula for the ground state energy of (2D) charged anyon gas. This result allows us in the present paper to estimate the exchangecorrelation energy, which is as it is…
In this work, we consider the experimental data on the oxidation of the silicon surface in vacuum with subsequent annealing obtained by total current spectroscopy. Studies have shown that when using temperature…
The paper presents the results of research on the development, manufacture, calibration and testing of acoustic emission (AE) system for non-destructive control and monitoring of the states of concrete structures of…
he structural properties of thin-film solid solutions (GaAs)1-х(Ge2)x grown by liquid-phase epitaxy on GaAs single crystal substrates are studied. The resulting epitaxial layers had a thickness of 10 µm, a resistivity…
The increase in material removal rates and the quality of electrical discharge machining expands the possibilities of full-scale application of dielectric in industry. However, in the existing works, the dependence of…
In this work, we studied the effect of electron irradiation on the structure and morphology of the surface of a single crystal and polycrystal TlIn1-xCrxS2 (x=0.01). Irradiation of a TlIn1-xCrxS2 single crystal with…
The method of express-analysis of triethoxysilane and tetraethoxysilane, which are intermediate products of chemical reactions occurring in the framework of the silane technology for the synthesis of polycrystalline…