AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究

李明; 张荣; 刘斌; 傅德颐; 赵传阵; 谢自力; 修向前; 郑有炓

物理学报

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李明, 张荣, 刘斌, 傅德颐, 赵传阵, 谢自力, 修向前, 郑有炓. 2012: AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究, 物理学报, 61(2): 393-399.

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2012: Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells, Acta Physica Sinica, 61(2): 393-399.

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2012: Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells, Acta Physica Sinica, 61(2): 393-399.

AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究

江苏省光电信息功能材料重点实验室,南京大学电子科学与工程学院,南京微结构国家实验室,南京210093

Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells

摘要: 首先把本征值方程投影到导带的子空间中,进而得到AlGaN/GaN量子阱中第一、二子带的Rashba自旋劈裂系数（α_1,α_2）和子带自自旋-轨道耦合系数η_（12）.然后自恰求解薛定谔方程和泊松方程计算了不同栅压的量子阱中的α_1,α_2和η_（12）,并分别讨论了量子阱阱层、左右异质结界面和垒层对它们的贡献.结果表明可以通过栅压来调节自旋-轨道耦合系数,子带间自旋轨道耦合系数η_（12）比Rashba自旋劈裂系数α_1,α_2小,但基本在同一数量级.
- Rashba自旋劈裂 /
- 子带间自旋轨道耦合 /
- 自恰计算 /
- 二维电子气
Abstract: Rashba spin splitting coefficients for the first two subbandsα1,α2 and intersubband spin-orbit coupling coefficientη_（12） are obtained by projecting the characteristic equation into the subspace of conduction band.Then Schrodinger and the Poisson equations are solved self-consistently to calculateα_1,α_2 andη_（12） under different gate voltages.Then contributions to the spin-orbit coupling coefficients from the well,the left and the right heterointerfaces and the left and the right barriers of the quantum well are discussed. Resulsts show that the spin-orbit coupling coefficient can be modulated by the gate voltage,and the intersubband spin-orbit coupling coefficients calculated here are a little smaller than the Rashba coefficientsα_1,α_2,but they are basically of the same order.

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AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究

江苏省光电信息功能材料重点实验室,南京大学电子科学与工程学院,南京微结构国家实验室,南京210093

关键词:

摘要: 首先把本征值方程投影到导带的子空间中,进而得到AlGaN/GaN量子阱中第一、二子带的Rashba自旋劈裂系数（α_1,α_2）和子带自自旋-轨道耦合系数η_（12）.然后自恰求解薛定谔方程和泊松方程计算了不同栅压的量子阱中的α_1,α_2和η_（12）,并分别讨论了量子阱阱层、左右异质结界面和垒层对它们的贡献.结果表明可以通过栅压来调节自旋-轨道耦合系数,子带间自旋轨道耦合系数η_（12）比Rashba自旋劈裂系数α_1,α_2小,但基本在同一数量级.

English Abstract

Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells

江苏省光电信息功能材料重点实验室,南京大学电子科学与工程学院,南京微结构国家实验室,南京210093

Keywords:

Abstract: Rashba spin splitting coefficients for the first two subbandsα1,α2 and intersubband spin-orbit coupling coefficientη_（12） are obtained by projecting the characteristic equation into the subspace of conduction band.Then Schrodinger and the Poisson equations are solved self-consistently to calculateα_1,α_2 andη_（12） under different gate voltages.Then contributions to the spin-orbit coupling coefficients from the well,the left and the right heterointerfaces and the left and the right barriers of the quantum well are discussed. Resulsts show that the spin-orbit coupling coefficient can be modulated by the gate voltage,and the intersubband spin-orbit coupling coefficients calculated here are a little smaller than the Rashba coefficientsα_1,α_2,but they are basically of the same order.

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AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究

Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells

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AlGaN/GaN量子阱中子带的Rashba自旋劈裂和子带间自旋轨道耦合作用研究

English Abstract

Study of Rashba spin splitting and intersubband spin-orbit coupling effect in AlGaN/GaN quantum wells

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