Browsing by Author/Contributor "MacDonald, A. H."

Now showing items 1-5 of 5

  • Drag in Paired Electron-Hole Layers 

    Vignale, Giovanni, 1957-; MacDonald, A. H. (American Physical Society, 1996)
    We investigate transresistance effects in electron-hole double-layer systems with a superfluid electron-hole condensate. Our theory is based on the use of a minimum dissipation premise to fix the current carried by the ...

  • Drude weight, plasmon dispersion, and a.c. conductivity in doped graphene sheets 

    Abedinpour, Saeed H.; Vignale, Giovanni, 1957-; Principi, A.; Polini, Marco; Tse, Wang-Kong; MacDonald, A. H. (arXiv, 2011)
    We demonstrate that the plasmon frequency and Drude weight of the electron liquid in a doped graphene sheet are strongly renormalized by electron-electron interactions even in the long-wavelength limit. This e ffect is not ...

  • Drude weight, plasmon dispersion, and pseudospin response in doped graphene sheets 

    Polini, Marco; MacDonald, A. H.; Vignale, Giovanni, 1957- (arXiv, 2009)
    Plasmons in ordinary electron liquids are collective excitations whose long-wavelength limit is rigid center-of-mass motion with a dispersion relation that is, as a consequence of Galileian invariance, unrenormalized by ...

  • Engineering superfluidity in electron-hole double layers 

    Conti, Sergio; Vignale, Giovanni, 1957-; MacDonald, A. H. (American Physical Society, 1998)
    We show that band-structure effects are likely to prevent superfluidity in semiconductor electron-hole double-layer systems. We suggest the possibility that superfluidity could be realized by the application of uniaxial ...

  • Theory of the Pseudospin Resonance in Semiconductor Bilayers 

    Abedinpour, Saeed H.; Polini, Marco; MacDonald, A. H.; Tanatar, B.; Vignale, Giovanni, 1957- (American Physical Society, 2007)
    The pseudospin degree of freedom in a semiconductor bilayer gives rise to a collective mode analogous to the ferromagnetic-resonance mode of a ferromagnet. We present a many-body theory of the dependence of the energy and ...