Browsing by Subject "Quantum Hall effect"
Now showing items 116 of 16

Bosonization of the twodimensional electron gas in the lowest Landau level
(arXiv, 199801)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: Singlemode approximation calculations
(American Physical Society, 200602)A variety of recent experiments probing the lowtemperature 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 spinHall effect of a twodimensional electron gas
(American Physical Society, 200603)We develop the microscopic theory of the extrinsic spinHall conductivity of a two dimensional electron gas, including skew scattering, sidejump, and Coulomb interaction effects. We find that while the spinHall ... 
Disclination unbinding transition in quantum Hall liquid crystals
(American Physical Society, 200108)We derive the longwavelength elastic theory for the quantum Hall smectic state starting from the HartreeFock 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
(arXiv, 200509)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
(arXiv, 200901)Plasmons in ordinary electron liquids are collective excitations whose longwavelength limit is rigid centerofmass 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 lowdensity electron bilayers
(arXiv, 200610)We investigate the effect of exchange and correlation (xc) on the plasmon spectrum and the Coulomb drag between spatially separated lowdensity twodimensional electron layers. We adopt a new approach, which employs dynamic ... 
Failure of the local density approximation in timedependent spin density functional theory
(arXiv, 200209)It has been known for some time that the exchangecorrelation 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 hypernettedchain study of halffilled Landau levels with broken rotational symmetry
(American Physical Society, 200204)We investigate broken rotational symmetry (BRS) states at halffilling 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 twodimensional electrons in strong magnetic fields
(American Physical Society, 200403)Based on the KosterlitzThoulessHalperinNelsonYoung theory of twodimensional melting and the analogy between Laughlin states and the twodimensional onecomponent plasma, we investigate the possibility of liquid ... 
Lorentz shear modulus of a twodimensional electron gas at high magnetic field
(American Physical Society, 200710)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 ... 
Manybody effective mass enhancement in a twodimensional electron liquid
(arXiv, 200412)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 twodimensional (2D) electron liquid (EL). ... 
Monte Carlo simulation method for Laughlinlike states in a disk geometry
(American Physical Society, 200302)We discuss an alternative accurate Monte Carlo method to calculate the groundstate 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
(American Physical Society, 200801)We obtain analytic formulas for the frequencydependent spinHall conductivity of a twodimensional electron gas (2DEG) in the presence of impurities, linear spin orbit Rashba interaction, and external magnetic field ... 
Properties of lowdimensional systems
(University of MissouriColumbia, 2006)In this work we study the equilibrium properties of systems in twodimensions, and the effects that discrete symmetry, space dimensionality, character of the interaction and number of internal degrees of freedom have on ... 
SpinHall Effect in a [110] GaAs Quantum Well
(American Physical Society, 200612)A selfconsistent treatment of the spinHall effect requires consideration of the spin orbit coupling and electronimpurity scattering on equal footing. This is done here for the experimentally relevant case of a [110] ...