Unconventional dc Transport in Rashba Electron Gases.

Supplemental Material to “ Unconventional dc Transport in Rashba Electron Gases ”

To fix the notation, let us start by giving some details on the helicity eigenstates basis. The helicity operator is defined as S = [p̂⇥ ~ ]z and its eigenstates, |ksi, with s = ±1, satisfy the relation S|k±i = ±|k±i. A simple calculation shows in particular that |k±i can be expressed in terms of the standard spin eigenstates, |k "i and |k #i, as |k±i = (exp ( i✓k)|k "i± i|k #i)/ p 2 with ✓k = a...

Molecular beam epitaxy of high mobility In0.75Ga0.25As for electron spin transport applications

The authors describe the molecular beam epitaxy of relaxed, nominally undoped In0.75Ga0.25As–In0.75Al0.25As quantum well structures grown on InP substrates. The maximum two-dimensional electron density is 2 1011 cm−2, with a peak mobility of 2.2 105 cm2 V−1 s−1 at 1.5 K. In high magnetic field, the electron g-factor was shown to have a magnitude of 9.1 0.1 at Landau-level filling factor of 4. T...

Competition between spin-orbit interaction and Zeeman coupling in Rashba two-dimensional electron gases

Rashba spin-orbit coupling and spin relaxation in silicon quantum wells

Silicon is a leading candidate material for spin-based devices, and two-dimensional electron gases s2DEGsd formed in silicon heterostructures have been proposed for both spin transport and quantum dot quantum computing applications. The key parameter for these applications is the spin relaxation time. Here we apply the theory of D’yakonov and Perel’ sDPd to calculate the electron spin resonance...

Anisotropic current-induced spin accumulation in the two-dimensional electron gas with spin-orbit coupling

We investigate the magnetoelectric (or inverse spin-galvanic) effect in the two dimensional electron gases with both Rashba and Dresselhaus spin-orbit coupling using an exact solution of the Boltzmann equation for electron spin and momentum. The spin response to an in-plane electric field turns out to be highly anisotropic while the usual charge conductivity remains isotropic, contrary to earli...