University of Basel  > Condensed Matter Theory

Sigurdur Erlingsson, Dr. 

Address:  Office 4.7b 
Department of Physics and Astronomy 
University of Basel 
Klingelbergstrasse 82 
CH-4056 Basel, Switzerland
phone (office):  +41 61 267 3695 
fax:  +41 61 267 1349



Determining the spin Hall conductance via charge transport
Sigurdur I. Erlingsson, Daniel Loss,

We propose a scheme where transport measurements of charge current and its noise can be used to determine the spin Hall conductance in a four-terminal setup. Starting from the scattering formalism we express the spin current and spin Hall conductance in terms of spin-dependent transmission coefficients. These coefficients are then expressed in terms of charge current and noise. We use the scheme to characterize the spin injection efficiency of a ferromagnetic/semiconductor interface.

Spin susceptibilities, spin densities and their connection to spin-currents
Sigurdur I. Erlingsson, John Schliemann, Daniel Loss,
cond-mat/0406531; Phys. Rev. B 71, 035319 (2005)

We calculate the frequency dependent spin susceptibilities for a two-dimensional electron gas with both Rashba and Dresselhaus spin-orbit interaction. The resonances of the susceptibilities depends on the relative values of the Rashba and Dresselhaus spin-orbit constants, which could be manipulated by gate voltages. We derive exact continuity equations, with source terms, for the spin density and use those to connect the spin current to the spin density. In the free electron model the susceptibilities play a central role in the spin dynamics since both the spin density and the spin current are proportional to them.