The Experts below are selected from a list of 36630 Experts worldwide ranked by ideXlab platform

Kangxian Guo - One of the best experts on this subject based on the ideXlab platform.

  • Electron–Phonon Interaction effect on optical absorption in cylindrical quantum wires
    Solid State Communications, 2006
    Co-Authors: Shining Zhu, Kangxian Guo
    Abstract:

    Abstract Electron–Phonon Interaction effects on linear and nonlinear optical absorption in cylindrical quantum wires are investigated. The linear and nonlinear optical absorption coefficients are obtained by using compact-density-matrix approach and iterative method, and the numerical results are presented for GaAs/AlAs cylindrical quantum-well wires. The results show that electron–Phonon Interaction not only influences the relaxation rate but also distinctly influences the wave functions and energies of the electron. The correction of electron–Phonon Interaction effect on the wave functions of the electron dominates the values of absorption coefficients. Moreover, the correction of electron–Phonon Interaction effect on the energies of the electron makes the absorption peaks blue shift and become wider.

Youbin Yu - One of the best experts on this subject based on the ideXlab platform.

  • electron Phonon Interaction effect on optical absorption in cylindrical quantum wires
    Solid State Communications, 2006
    Co-Authors: Youbin Yu
    Abstract:

    Abstract Electron–Phonon Interaction effects on linear and nonlinear optical absorption in cylindrical quantum wires are investigated. The linear and nonlinear optical absorption coefficients are obtained by using compact-density-matrix approach and iterative method, and the numerical results are presented for GaAs/AlAs cylindrical quantum-well wires. The results show that electron–Phonon Interaction not only influences the relaxation rate but also distinctly influences the wave functions and energies of the electron. The correction of electron–Phonon Interaction effect on the wave functions of the electron dominates the values of absorption coefficients. Moreover, the correction of electron–Phonon Interaction effect on the energies of the electron makes the absorption peaks blue shift and become wider.

Mitsuru Matsuura - One of the best experts on this subject based on the ideXlab platform.

  • Exciton-LO Phonon Interaction in a quantum dot
    Journal of Luminescence, 2000
    Co-Authors: Kazunori Oshiro, Mitsuru Matsuura
    Abstract:

    Abstract Exciton–LO Phonon Interaction in a spherical quantum dot embedded in non-polar matrix is studied using the dielectric continuum model and the intermediate-coupling-type theory. The Interaction contribution can be divided into the self-energy-type and the screening-type terms. Both terms depend on the size of the quantum dot and tend to cancel especially much in the smaller dot. In the limit of the smaller dot both terms approach to zero and then effects of the exciton–LO Phonon Interaction vanish. These properties reflect the nature of the exciton–LO Phonon Interaction in the quantum dot.

  • Electron-Phonon Interaction in mixed crystals
    Physical Review B, 1999
    Co-Authors: Ruisheng Zheng, Mitsuru Matsuura
    Abstract:

    A theory of electron\char21{}optical-Phonon Interaction in mixed crystals where there are two-mode Phonons present is reported. Based on the pseudo-unit-cell approach the free optical-Phonon Hamiltonian and the electron-Phonon Interaction Hamiltonian of mixed polar crystals are obtained. Polaron energy shifts and electron effective masses of some mixed crystals are discussed by the perturbation method. It is found that, although the Fr\"ohlich coupling constant of each Phonon mode exhibits a nonlinear relation, the sum of the coupling constants of the two modes shows a linear relation with the concentration of the mixed crystal. Our theoretical result supports that the linear interpolation method used to estimate the Fr\"ohlich constants and the polaronic correction of the electron effective masses is valid in the weak electron-Phonon coupling case.

Shining Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Electron–Phonon Interaction effect on optical absorption in cylindrical quantum wires
    Solid State Communications, 2006
    Co-Authors: Shining Zhu, Kangxian Guo
    Abstract:

    Abstract Electron–Phonon Interaction effects on linear and nonlinear optical absorption in cylindrical quantum wires are investigated. The linear and nonlinear optical absorption coefficients are obtained by using compact-density-matrix approach and iterative method, and the numerical results are presented for GaAs/AlAs cylindrical quantum-well wires. The results show that electron–Phonon Interaction not only influences the relaxation rate but also distinctly influences the wave functions and energies of the electron. The correction of electron–Phonon Interaction effect on the wave functions of the electron dominates the values of absorption coefficients. Moreover, the correction of electron–Phonon Interaction effect on the energies of the electron makes the absorption peaks blue shift and become wider.

Das S Sarma - One of the best experts on this subject based on the ideXlab platform.

  • surface polar optical Phonon Interaction induced many body effects and hot electron relaxation in graphene
    Physical Review B, 2013
    Co-Authors: E H Hwang, Das S Sarma
    Abstract:

    We theoretically study various aspects of the electron-surface optical Phonon Interaction effects in graphene on a substrate made of polar materials. We calculate the electron self-energy in the presence of the surface Phonon-mediated electron-electron Interaction focusing on how the linear chiral graphene dispersion is renormalized by the surface Phonons. The electron self-energy as well as the quasiparticle spectral function in graphene are calculated, taking into account electron-polar optical Phonon Interaction by using a many body perturbative formalism. The scattering rate of free electrons due to polar Interaction with surface optical Phonons in a dielectric substrate is calculated as a function of the electron energy, temperatures, and carrier density. Effects of screening on the self-energy and scattering rate are discussed. Our theory provides a comprehensive quantitative (and qualitative) picture for surface Phonon Interaction induced many-body effects and hot electron relaxation in Dirac materials.