Results 1 - 10 of 11
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[en] The thermopower of two-dimensional parabolic quantum wires and quantum contacts in magnetic field is investigated. We obtain a convenient analytic formula for the thermopower of these structures. The temperature dependence of the thermopower is studied and the influence of the magnetic field on the thermopower is examined. Oscillations in the thermopower are investigated
[en] Intraband absorption of electromagnetic radiation by electrons in a quantum channel in a transverse quantizing magnetic field is studied. In the calculation, the interaction of conductivity electrons with optical phonons is taken into account. An analytical expression for the coefficient of absorption of high-frequency electromagnetic radiation is derived. It is shown that the absorption spectrum exhibits asymmetric resonance peaks, and the positions of the peaks are determined. The dependence of the absorption coefficient on the magnetic field is studied.
[en] The behavior of an acoustoelectric current through a three-dimensional quantum microconstriction placed in a longitudinal uniform magnetic field is studied theoretically in the ballistic transport regime. The oscillation periods of the acoustoelectric current are studied in detail as functions of the chemical potential and the magnetic field induction. The temperature effect is taken into account. It is shown that the acoustoelectric current as a function of the chemical potential can exhibit a steplike behavior. The limits for the existence of a steplike structure are determined
[en] Low-temperature conductance of crossed carbon nanotubes with a point contact is investigated theoretically. Explicit formulas for the conductance of the device are obtained by solving the Schroedinger equation. It is shown that the conductance of each tube has minima associated with the resonance scattering of electrons at the points of contact as well with the transfer of electrons to the second tube. The electron transport between the first and the second tubes exhibits resonance behavior
[en] A dc electric current due to a flow of ultrasonic phonons through a quantum wire containing an isolated point impurity is analyzed theoretically. An explicit expression for the acoustoelectric (AE) current is obtained and its dependence on the chemical potential of the electron gas and the induction of the external magnetic field is investigated. It is shown that a point impurity may lead to a partial or complete destruction of the steplike structure of the AE current as a function of the chemical potential
[en] The thermopower of asymmetrical quantum wires and constrictions in an arbitrarily directed magnetic field is investigated. An analytic expression convenient for analysing the thermopower is obtained. The oscillations in the thermopower are studied. It is shown that the thermopower as a function of a magnetic field can undergo Aharonov-Bohm and Shubnikov-de Haas oscillations
[en] An explicit analytic expression is derived for the magnetic moment of a 2D electron gas taking into account the spin-orbit interaction in the Rashba model with T = 0. The cases of constant chemical potential and number of electrons are investigated. The magnetic field and temperature dependences of the magnetic moment are analyzed. The results are compared with the results of experimental studies of magnetization
[en] Electron transport through a quantum sphere with three one-dimensional wires attached to it is investigated. An explicit form for the transmission coefficient as a function of the electron energy is found from first principles. The asymmetric Fano resonances are detected in the transmission of the system. The collapse of the resonances is shown to appear under certain conditions. A two-terminal nanodevice with an additional gate lead is studied using the developed approach. Additional resonances and minima of transmission are indicated in the device
[en] The influence of electromagnetic radiation on electron transport in a quantum channel with a single short-range impurity is studied using the generalization of the Landauer-Büttiker method. It is shown that a direct photocurrent is induced in the system in the case of asymmetric impurity location. The dependence of the photocurrent on the electron chemical potential, impurity location, and radiation frequency is studied
[en] An analytical expression for the coefficient of absorption of electromagnetic radiation by electrons in a quantum wire in a magnetic field is derived. The case of a magnetic field transverse with respect to the wire axis is considered. The resonance character of absorption is shown, and the resonance frequencies as functions of the field are determined. The effect of the scattering of electrons at optical phonons is studied, and it is shown that scattering is responsible for additional resonance absorption peaks.