Dependence of Spin-orbit Parameters in AlxGa1-xN/GaN Quantum Wells on the Al Composition of the Barrier

作者：Li Ming^*

来源：Communications in Theoretical Physics, 2013, 60(1): 119-123.

• spin-orbit coupling effect
• Rashba spin splitting
• intersubband spin-orbit coupling
• 2DEG

In this paper, we obtain considerable spin-orbit (SO) parameters in AlxGa1-xN/GaN quantum wells (QWs) with sheet carrier concentration N-s = 120 x 10(11)/cm(2). With increasing Al content (x) of the barrier, the SO parameters increase as a whole, and the two major contributions are found to be the decrease of the expansion region of the envelope functions and the increase of the polarized electric field in the well. Compared with the Rashba parameters for the first two subbands, the intersubband SO parameter is a bit smaller and varies more slowly with x. The results indicate the SO parameters, especially the Rashba parameters can be engineered by the Al composition of the barrier, which may be helpful to the spin manipulation of III-nitride low-dimensional heterostructures.

• 出版日期2013-7
• 单位许昌学院