Electron-phonon dynamics in an ensemble of nearly isolated nanoparticles
Electron-phonon dynamics in an ensemble of nearly isolated nanoparticles
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DOI：
10.1103/physrevb.64.115412
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发表时间：
2001-09-15
影响因子：
3.7
通讯作者：
Geller, MR
中科院分区：
文献类型：
--
作者：
Simon, DT;Geller, MR
我们调查的电子布居动力学在一个几乎孤立的绝缘纳米粒子，每个纳米粒子作为一个电子两级系统耦合到一个单一的振动模式建模的合奏。我们发现，在短时间内的整体平均激发态人口振荡，但有一个衰减的信封。在长时间内，振荡变成关于“平台”人口的纯正弦曲线，频率由电子-声子相互作用强度确定，包络以代数方式衰减为t（-1/2）。我们用这个理论来预测电子-声子动力学系综的Y2 O3：Eu 3+纳米粒子。
We investigate the electron population dynamics in an ensemble of nearly isolated insulating nanoparticles, each nanoparticle modeled as an electronic two-level system coupled to a single vibrational mode. We find that at short times the ensemble-averaged excited-state population oscillates but has a decaying envelope. At long times, the oscillations become purely sinusoidal about a "plateau" population, with a frequency determined by the electron-phonon interaction strength and with an envelope that decays algebraically as t(-1/2). We use this theory to predict electron-phonon dynamics in an ensemble Of Y2O3: Eu3+ nanoparticles.