• Bosonization of the two-dimensional electron gas in the lowest Landau level 

    Conti, Sergio; Vignale, Giovanni, 1957- (arXiv, 1998-01)
    We develop a bosonization scheme for the collective dynamics of a spinless two- dimensional electron gas (2DEG) in the lowest Landau level. The system is treated as a continuous elastic medium, and quantum commutation ...
  • Collective excitations in quantum Hall liquid crystals: Single-mode approximation calculations 

    Lapilli, Cintia Mariela, 1980-; Wexler, Carlos, 1966- (American Physical Society, 2006-02)
    A variety of recent experiments probing the low-temperature transport properties of quantum Hall systems have suggested an interpretation in terms of liquid crystalline mesophases dubbed quantum Hall liquid crystals. The ...
  • Coulomb corrections to the extrinsic spin-Hall effect of a two-dimensional electron gas 

    Hankiewicz, E. M.; Vignale, Giovanni, 1957- (American Physical Society, 2006-03)
    We develop the microscopic theory of the extrinsic spin-Hall conductivity of a two- dimensional electron gas, including skew- scattering, side-jump, and Coulomb interaction effects. We find that while the spin-Hall ...
  • Disclination unbinding transition in quantum Hall liquid crystals 

    Dorsey, Alan T.; Wexler, Carlos, 1966- (American Physical Society, 2001-08)
    We derive the long-wavelength elastic theory for the quantum Hall smectic state starting from the Hartree-Fock approximation. Dislocations in this state lead to an effective nematic model for T>0, which undergoes a ...
  • Dissipation through spin Coulomb drag in electronic spin dynamics 

    D'Amico, Irene; Ullrich, Carsten A. (arXiv, 2005-09)
    Spin Coulomb drag (SCD) constitutes an intrinsic source of dissipation for spin currents in metals and semiconductors. We discuss the power loss due to SCD in potential spintronics devices and analyze in detail the associated ...
  • Drude weight, plasmon dispersion, and pseudospin response in doped graphene sheets 

    Polini, Marco; MacDonald, A. H.; Vignale, Giovanni, 1957- (arXiv, 2009-01)
    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 ...
  • Exchange and correlation effects on the plasmon dispersions and the Coulomb drag in low-density electron bilayers 

    Badalyan, S. M.; Kim, C. S.; Vignale, Giovanni, 1957-; Senatore, G. (arXiv, 2006-10)
    We investigate the effect of exchange and correlation (xc) on the plasmon spectrum and the Coulomb drag between spatially separated low-density two-dimensional electron layers. We adopt a new approach, which employs dynamic ...
  • Failure of the local density approximation in time-dependent spin density functional theory 

    Qian, Zhixin; Constantinescu, Adi; Vignale, Giovanni, 1957- (arXiv, 2002-09)
    It has been known for some time that the exchange-correlation potential in time- dependent density functional theory is an intrinsically nonlocal functional of the density as soon as one goes beyond the adiabatic approximation. ...
  • Fermi hypernetted-chain study of half-filled Landau levels with broken rotational symmetry 

    Ciftja, Orion; Wexler, Carlos, 1966- (American Physical Society, 2002-04)
    We investigate broken rotational symmetry (BRS) states at half-filling of the valence Landau level (LL). We generalize Rezayi and Read's (RR) trial wave function, a special case of Jain's composite fermion (CF) wave ...
  • Liquid crystalline states for two-dimensional electrons in strong magnetic fields 

    Ciftja, Orion; Lapilli, Cintia Mariela, 1980-; Wexler, Carlos, 1966- (American Physical Society, 2004-03)
    Based on the Kosterlitz-Thouless-Halperin-Nelson-Young theory of two-dimensional melting and the analogy between Laughlin states and the two-dimensional one-component plasma, we investigate the possibility of liquid ...
  • Lorentz shear modulus of a two-dimensional electron gas at high magnetic field 

    Tokatly, I. V.; Vignale, Giovanni, 1957- (American Physical Society, 2007-10)
    We show that the Lorentz shear modulus—one of the three elastic moduli of a homogeneous electron gas in a magnetic field—can be calculated exactly in the limit of high magnetic field (i.e., in the lowest Landau level) and ...
  • Many-body effective mass enhancement in a two-dimensional electron liquid 

    Asgari, R.; Davoudi, B.; Polini, Marco; Tosi, M. P.; Giuliani, Gabriele, 1953-; Vignale, Giovanni, 1957- (arXiv, 2004-12)
    Motivated by a large number of recent magnetotransport studies we have revisited the problem of the microscopic calculation of the quasiparticle effective mass in a paramagnetic two-dimensional (2D) electron liquid (EL). ...
  • Monte Carlo simulation method for Laughlin-like states in a disk geometry 

    Ciftja, Orion; Wexler, Carlos, 1966- (American Physical Society, 2003-02)
    We discuss an alternative accurate Monte Carlo method to calculate the ground-state energy and related quantities for Laughlin states of the fractional quantum Hall effect in a disk geometry. This alternative approach ...
  • Phase Diagram of the Spin Hall Effect 

    Hankiewicz, E. M.; Vignale, Giovanni, 1957- (American Physical Society, 2008-01)
    We obtain analytic formulas for the frequency-dependent spin-Hall conductivity of a two-dimensional electron gas (2DEG) in the presence of impurities, linear spin- orbit Rashba interaction, and external magnetic field ...
  • Properties of low-dimensional systems 

    Lapilli, Cintia Mariela, 1980- (University of Missouri--Columbia, 2006)
    In this work we study the equilibrium properties of systems in two-dimensions, and the effects that discrete symmetry, space dimensionality, character of the interaction and number of internal degrees of freedom have on ...
  • Spin-Hall Effect in a [110] GaAs Quantum Well 

    Hankiewicz, E. M.; Vignale, Giovanni, 1957-; Flatte, M. E. (American Physical Society, 2006-12)
    A self-consistent treatment of the spin-Hall effect requires consideration of the spin- orbit coupling and electron-impurity scattering on equal footing. This is done here for the experimentally relevant case of a [110] ...