Abstract
By using the perturbation expansion method and self-consistent iterative method, we evaluate the effect of the conduction band nonprabolicity on the wave vector (kt) dependent Rashba coefficient (α) and nonlinear Rashba spin splitting (ΔE) in the Al0.5Ga0.5N/GaN quantum well (QW). The effective mass (energy) under the first order approximation mt1 (Ek1) is in proximity to the iterative result mtp (Ekp) and mt1>mtp, Ek1<Ekp, showing the higher order contributions to mt (Ek) are small. The sign of the nonparabolic correction to Ek is just opposite to that of the correction to mt. The increase of α and ΔE due to the conduction band nonparabolicity reaches about 3% at kt=1nm−1. Around the left heterointerface, the probability density is high and Ek0>Ekp>Ek1, so α0<αp<α1, ΔE0<ΔEp<ΔE1. With increasing kt, α decreases, and ΔE increases slowly. For small kt, α0 (ΔE0), α1 (ΔE1) and αp (ΔEp) are nearly the same. While for large kt, the difference between α0 and α1 (αp) increases rapidly, but the difference between ΔE0 and ΔE1 (ΔEp) increases slowly.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
