Electron - phonon scattering
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The result indicates that in the case of electron-acoustic phonon scattering, the Shubnikov-de Hass oscillation appears. Whereas, in the case of electrons-optical phonons scattering, the peak of magneto-photonphonon resonance appears. In both cases, when temperature increases, the Nernst coefficient decreases rapidly, and for electrons-optical phonons scattering, the resonance peak has a movement.
10p viambani 18-06-2024 1 1 Download
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Based on the quantum kinetic equation for electrons, we theoretically studied the Quantum Multi-photon Nonlinear Absorption of a Strong Electromagnetic Wave (EMW) in twodimensional graphene with electron-optical phonon scattering mechanism.
9p viambani 18-06-2024 3 1 Download
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In this work, we present a study of phonon hardening of 762 cm-1 phonon which is the strongest Raman-active mode in pyrochlore Cd2Os2O7 single crystal through temperature dependent Raman scattering. We discuss that the major contribution of the phonon hardening and the anomarlie behavior of asymmetry Fano parameter would involve to spin-phonon coupling and electronphonon coupling.
8p viambani 18-06-2024 2 1 Download
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Part 1 book "Problems in solid state physics with solutions" includes content: Drude theory of metals, sommerfeld theory of metals, bravais lattice, point groups, classification of bravais lattices, space groups of crystal structures, scattering of X-rays by a crystal, reciprocal lattice, X-ray diffraction on crystals, crystal structure by neutron diffraction, bonding in solids, cohesion of solids, normal modes of lattice vibrations, quantum theory of lattice vibrations, inelastic neutron scattering by phonons, origin of electronic energy bands.
146p muasambanhan10 06-04-2024 1 0 Download
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We applied the quantum kinetic equation method to investigate the influence of confined optical phonons (confined OP) on the photo-stimulated Ettingshausen effect in rectangular quantum wires (RQW) subjected to a perpendicular magnetic field. We considered the case where the confined electrons-confined OP scattering is the dominant mechanism.
7p viberkshire 09-08-2023 5 3 Download
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Theoretical results for the AME field is numerically evaluated, plotted and discussed for the specific CQWIP AlGaAs/GaAs. The result shows that the dependence of the AME field on the temperature of the system is nonlinear. These results are compared with those of normal bulk semiconductors and quantum well to show the difference.
3p vispyker 16-11-2022 8 3 Download
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The results in this case are compared with the case of the bulk semiconductors show the difference and the novelty of the results. The results numerically calculated for GaAs/AlGaAs in order to show the dependence of absorption coefficient on the photon energy of the temperature, the size of the asymmetric semi-parabolic quantum wells.
8p viindranooyi 07-05-2022 9 2 Download
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Quantum theory of nonlinear absorption of strong electromagnetic wave (EMW) by confined electrons in two - dimensional (2D) graphene without magnetic field has been studied by using the quantum kinetic equation in assumption of electron - optical phonon scattering. The analytic expression of absorption coefficient is obtained in 2D graphene.
9p viindranooyi 07-05-2022 11 2 Download
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Based on the quantum kinetic equation for electrons under the action of a linearly polarized electromagnetic wave, a dc electric field and an intense laser field, analytic expressions for the density of the direct current in rectangular quantum wire with an infinite potential for the case of electron - acoustic phonon scattering are calculated.
8p vijichoo2711 04-06-2021 16 1 Download
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The analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by confined electrons in the presence of laser radiation modulated by amplitude in doped superlattices (DSL) are obtained by using the quantum kinetic equation for electrons in the case of electron–optical phonon scattering.
11p tamynhan8 04-11-2020 15 2 Download
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The study results were numerically evaluated and graphed for GaAs/GaAsAl quantum wire. Then, the results in this case were compared with those in the case of the bulk semiconductors and other lowdimension systems in order to show the difference and the novelty of the current results.
8p tamynhan6 14-09-2020 12 2 Download
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The electron – optical phonon scattering is considered in detail to studying the Ettingshausen effect in doped semiconductor superlattice under the influence of phonon confinement and laser radiation. The analytical expressions for tensors and the Ettingshausen coefficient are obtained by using the kinetic equation method.
8p tamynhan6 14-09-2020 15 1 Download
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Quantum theory of absorption of electromagnetic wave (EMW) by confined electrons in two - dimensional (2D) graphene has been studied by using the quantum kinetic equation in assumption of electron - optical phonon scattering.
10p vigustavia2711 19-12-2019 11 0 Download
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The influence of confined acoustic phonons on the Hall Coefficient (HC) in a Cylindrycal Quantum Wire (CQW) with an infinite potential (for electron – confined acoustic phonons scattering). Consider a case where CQW is placed in a perpendicular magnetic field
6p vitheseus2711 24-10-2019 13 0 Download
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In this paper, we have used the method of quantum kinetic equation to calculate the analytic expression for Ettingshausen coefficient (EC) under the influence of confined phonon. We considered a quantum well in the presence of constant electric field, magnetic field and electromagnetic wave (EMW) with assumption that electron – confined optical phonon (OP) scattering is essential.
7p viposeidon2711 17-09-2019 16 0 Download
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The analytic results have shown that EC depends on temperature, magnetic field, characteristic quantities of EMW and m - quantum number which is specific the confined phonons in a complicated way. The numerical results for GaAs/GaAsAl quantum wells (QW) have displayed these dependence explicitly. In particular, when m is set to zero, we achieve results for magneto – thermoelectric effect in the same QW without the confinement of acoustic phonons.
7p queencongchua3 07-09-2019 22 3 Download
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The results are numerically evaluated and graphed for a GaAs/GaAsAl CQW to shows clearly the dependence of Hall conductivity and HC on above parameters. The obtained results are very different in comparison to our previous results in the case two-dimensional system (2D) and bulk semiconductor.
9p thithizone1 18-07-2019 20 0 Download
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The analytic expression for absorption power of a strong electromagnetic waves caused by confined electrons in quantum well is obtained in the case of electron-optical phonon scattering. Nonlinear optically detected electrophonon resonance (ODEPR) effect in a specific GaAs/AlAs quantum well with triangular potential is investigated.
10p danhnguyentuongvi 18-12-2018 17 0 Download
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The calculations are based on the linearized Boltzmann equation (BE) and the relaxation time approximation, assuming the scattering by acoustic phonons to be quasi-elastic. We consider three physically distinct temperature ranges with respect to phonon scattering: the Bloch-Gruneisen ¨ (BG), equipartition (EP), and inelastic regimes.
10p thuyliebe 08-10-2018 25 2 Download
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The photon - drag effect with optical phonon-electron scattering in rectangular quantum wire with an infinite potential is studied. Based on the quantum kinetic equation for electrons under the action of a linearly polarized electromagnetic wave, a dc electric field and an intense laser field, analytic expressions for the density of the direct current for the case of electron – optical phonon scattering are calculated.
7p truongtien_09 08-04-2018 25 0 Download