LO-phonon confinement and polaron effect in a quantum well.
LO-phonon confinement and polaron effect in a quantum well.
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DOI：
10.1103/physrevb.39.5907
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发表时间：
1989-03
期刊：
影响因子：
--
通讯作者：
Comas;Trallero-Giner;Riera
中科院分区：
文献类型：
--
作者：
Comas;Trallero-Giner;Riera
考虑电子与量子阱中受限LO声子的耦合，计算了极化子修正。量子阱中的电子-声子系统的电子-LO-声子哈密顿量取自以前的工作。在T= 0 K，弱耦合极化子具有抛物能带结构的条件下，利用标准微扰理论计算了电子自能。屏蔽效应沿着静态托马斯-费米近似的路线被包括在内。与不同的实验工作进行了比较，并取得了令人满意的一致性。我们还提出了与其他理论著作的比较。
Polaronic corrections are calculated considering electron coupling with confined LO phonons in a quantum well (QW). The electron–LO-phonon Hamiltonian for a confined electron-phonon system in a QW is taken from a previous work. The electron self-energy is calculated by use of the standard perturbation-theory treatment for the weak-coupling polaron assuming parabolic energy band structure and T= 0 K. Screening effects are included along the lines of the static Thomas-Fermi approximation. Comparison with different experimental works is made and acceptable agreement is achieved. We also present comparisons with other theoretical works on the subject.