Vertical Conductance in Superlattice in Strong Magnetic Field during Inter- and Intraband Transitions

Russian Physics Journal - The paper considers the influence of interband and intraband transitions on vertical conductance oscillations in superlattices in a strong longitudinal magnetic field. It...     

Thermoelectric power in quasi-two-dimensional systems with scattering of current carriers by phonons

The thermopower α in electron systems with a quasi-two-dimensional energy spectrum is investigated in the relaxation-time tensor approximation. The longitudinal and transverse components of the thermopower are calculated for scattering of the current carriers by different types of phonons. It is shown that the anisotropy of the thermopower in such systems is substantial. The dependence of a on the ratio of the Fermi level ɛ _F to the half-width ɛ ₀ of the one-dimensional conduction band is considered. For scattering by acoustical and nonpolar optical phonons, the thermopower changes sign: α becomes positive for ɛ _F<ɛ ₀. Comparison of the theory with published experimental data demonstrates good qualitative agreement. Fiz. Tverd. Tela (St. Petersburg) 39, 1857–1858 (October 1997)     

Evolution equation for thermodynamic systems with correlated states

We have derived time evolution equations for thermodynamic systems with correlated states, considering the change in a probability density, entropy, and phase space metric at fixed phase‐space locations and obtained simple relations between these quantities for the separate systems. © 2014 Wiley Periodicals, Inc. Complexity 21: 162–165, 2015     

Galvano- and Thermomagnetic phenomena in thin films with nonidentical surfaces

A theory of galvano- and thermomagnetic phenomena in thin films with nonidentical surfaces is presented. The kinetic equation is solved with consideration of boundary conditions in films with nonidentical surfaces in the presence of a magnetic field perpendicular to the film plane, and an electric field and temperature gradient within the film plane. General expressions are found for the components of the galvano- and thermomagnetic tensors _ik, _ik, _ik which are oscillating functions of film thickness and magnetic field. A detailed analysis is performed of the dependence of magnetic resistance(d, H), the Nernst — Ettingshausen(N-E) coefficient Q(d, H), the electron component of thermal conductivity(d, H), and the thermo-emf(d, H) on film thickness and magnetic field.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 86–91, October, 1977.In conclusion, the authors express their gratitude to B. M. Askerov for his constant interest in the study and fruitful evaluation of the results.     

Reggi-Leduc and Maggi-Reggi-Leduc effects in conducting films with an anisotropic dispersion law

The influence of the spectrum and bulk scattering anisotropies on the Reggi-Leduc and Maggi-Reggi-Leduc effects is investigated in semiconducting films of the electronic silicon type under classical dimensional effect conditions. It is shown that in contrast to a massive specimen these effects depend not only on a single parameter, the ratio between the anisotropy coefficients of the effective mass and the relaxation time but also on each of them separately, which permit their direct determination. It is also established that the Reggi-Leduc coefficient depends differently on the film thickness, depending on the relationship between the electron and phonon parts of the crystal heat conductivity.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 106–110, June, 1989.     

Anisotropy of impurity scattering and electrical conductivity in quasi-two-dimensional electronic systems

Scattering of charge carriers by impurity ions in quasi-two-dimensional electronic systems is investigated. The dependences of the longitudinal and transverse components of the relaxation time on the wave vector components and the screening length are analyzed. The anisotropy of electrical conductivity of a degenerate quasi-two-dimensional electron gas is studied as a function of the ratio between the energy at the Fermi level and the miniband width, the impurity concentration, and the lattice constant.