Browsing by Subject "Electron-phonon interactions"

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    Effects of anisotropy on the critical temperature in layered nonadiabatic superconductors
    (Elsevier Science B.V., 2003) Askerzade, I. N.; Tanatar, Bilal
    The generalized anisotropic Eliashberg theory is employed to study the critical temperature of layered nonadiabatic superconductors where the relevant phonon energy is comparable to the Fermi energy. We consider a two-dimensional model appropriate for cuprate compounds and recently discovered superconductor magnesium-diboride (MgB2) which also reveals layered structure. By using the McMillan approximation we present the result of calculations of critical temperature Tc. It is shown that the critical temperature is enhanced due to the influence of anisotropy and nonadiabaticity.
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    Theoretical investigations on the energy relaxation in two-dimensional GaN systems
    (Wiley, 2007) Taş, Murat; Tanatar, Bilal
    We theoretically study the energy relaxation of hot electrons via LO-phonon emission in two-dimensional GaN systems. We employ a model in which electrons and the lattice are in equilibrium separately, and the effective electron temperature is much larger than the lattice temperature. We include the dynamical screening of electrons, electron-phonon interactions reduced phonon self-energy correction, the hot-phonon, and the finite-size effects. The power loss to acoustic phonons is also considered.