Gabriele F. Giuliani

Analytical expressions for the charge-charge local-field factor and the exchange-correlation kernel of a two-dimensional electron gas

We present an analytical expression for the static many-body local field factor

Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling.

{G}_{+}(q)

Quasiparticle self-energy and many-body effective mass enhancement in a two-dimensional electron liquid

of a homogeneous two-dimensional electron gas, which reproduces diffusion Monte Carlo data and embodies the exact asymptotic behaviors at both small and large wave number q. This allows us to also provide a closed-form expression for the exchange and correlation kernel

Analytical expressions for the spin-spin local-field factor and the spin-antisymmetric exchange-correlation kernel of a two-dimensional electron gas

{K}_{\mathrm{xc}}(r),

Magnetic field dependence of the critical current of a layered superconductor

which represents a key input for density functional studies of inhomogeneous systems.

Correlation energy in a spin-polarized two-dimensional electron liquid in the high-density limit

Evidence is presented for the finite wave vector crossing of the two lowest one-dimensional spin-split subbands in quantum point contacts fabricated from two-dimensional hole gases with strong spin-orbit interaction. This phenomenon offers an elegant explanation for the anomalous sign of the spin polarization filtered by a point contact, as observed in magnetic focusing experiments. Anticrossing is introduced by a magnetic field parallel to the channel or an asymmetric potential transverse to it. Controlling the magnitude of the spin splitting affords a novel mechanism for inverting the sign of the spin polarization.

Exchange energy and generalized polarization in the presence of spin-orbit coupling in two dimensions

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). Our systematic study is based on a generalized

Two exact properties of the perturbative expansion for the two-dimensional electron liquid with Rashba or Dresselhaus spin-orbit coupling

GW

RKKY range function of a one-dimensional noninteracting electron gas

approximation which makes use of the many-body local fields and takes advantage of the results of the most recent QMC calculations of the static charge- and spin-response of the 2D EL. We report extensive calculations for the many-body effective mass enhancement over a broad range of electron densities. In this respect we critically examine the relative merits of the on-shell approximation, commonly used in weak-coupling situations, {\it versus} the actual self-consistent solution of the Dyson equation. We show that already for

Triplet exciton and ferromagnetic instability of a two-dimensional electron gas in a large magnetic field with filling factor v=2

r_s \simeq 3