Nature of coupled-mode contributions to hot-electron relaxation in semiconductors.
Nature of coupled-mode contributions to hot-electron relaxation in semiconductors.
复制标题
耦合模式对半导体热电子弛豫贡献的性质。
作者：
Dharma
利用非平衡绿色函数研究了热电子、热LO声子和声学声子池系统中的能量流。在最低阶，Kogan的公式的能量损失率。当耦合模式包括在内时，我们发现，与Das Sarma及其同事形成鲜明对比的是，能量损失率被耦合模式的形成显着抑制，准粒子模式对能量损失率没有贡献
The energy flow in a system of hot electrons, hot LO phonons, and a bath of acoustic phonons is studied using nonequilibrium Green functions. In lowest order, Kogan's formula for the energy-loss rate is obtained. When coupled modes are included we find, in sharp contrast to Das Sarma and co-workers, that the energy-loss rate is significantly suppressed by coupled-mode formation and quasiparticlelike modes do not contribute to the energy-loss rate