Universal spin-induced time reversal symmetry breaking in two-dimensional electron gases with Rashba spin-orbit interaction.
We have experimentally studied the spin-induced time reversal symmetry (TRS) breaking as a function of the relative strength of the Zeeman energy (E(Z)) and the Rashba spin-orbit interaction energy (E(SOI)), in InGaAs-based 2D electron gases. We find that the TRS breaking, and hence the associated dephasing time tau(phi)(B), saturates when E(Z) becomes comparable to E(SOI). Moreover, we show that the spin-induced TRS breaking mechanism is a universal function of the ratio E(Z)/E(SOI), within the experimental accuracy.
Meijer
F E
FE
Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands. f.e.meijer@tnw.tudelft.nl
Morpurgo
A F
AF
Klapwijk
T M
TM
Nitta
J
J