Abstract
The following errors appeared in the above-mentioned article: k-vector values have to be multiplied by a factor of 2π. In turn, effective masses, Rashba parameters as well as the channel length are affected. In the evaluation of the effective masses an additional correction by a factor of 10 must be taken into account. Specifically, we report in the Table below the values that have to be corrected. All the conclusions of the paper remain valid. The authors apologize for any inconvenience that may have been caused due to these errors.