三角量子阱中 弱耦合极化子声子平均数研究

在三角量子阱中,考虑电子和光学声子的弱耦合,用线性组合算符和幺正变换相结合的方法,导出了三角量子阱中弱耦合极化子的声子平均数表达式,发现了电-声子耦合系数和声子平均数的线性关系。结果表明电声子耦合强度对声子平均数的影响不可忽略,以半导体弱耦合材料为例讨论了两者之间明确的比例性,此结果在实际研究中有一定的指导意义。

Abstract

Considering the weak-coupling of electrons and optical phonons, the expression of phonon mean number of weak-coupling polaron in triangular quantum well is derived by combining linear combination operator with unitary transformation. The linear relationship between electron-phonon coupling coefficient and phonon mean number is found. Results show that the influence of electron-phonon coupling strength on the phonon mean number can’t be ignored. Taking the semiconductor weak-coupled material as an example, the definite proportionality between the two materials is discussed. The result has certain theoretical guiding significance in the practical research.

参考文献

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张海瑞, 丽英, 高宽云. 三角量子阱中弱耦合极化子声子平均数研究[J]. 量子电子学报, 2018, 35(6): 743. ZHANG Hairui, LI Ying, GAO Kuanyun. Mean number of phonons of weak-coupling polaron in triangular quantum well[J]. Chinese Journal of Quantum Electronics, 2018, 35(6): 743.

三角量子阱中弱耦合极化子声子平均数研究

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