热声子效应对二维电子气GaN中高场输运的影响
Hot phonon effects on high-field transport in 2DEG GaN
AI总结：
本文利用系综蒙特卡洛模拟研究GaN二维电子气的高场输运，发现受限电子与体声子模型下热声子效应不显著，且无负微分电导，碰撞电离可忽略。
摘要：
通过系综蒙特卡洛代码研究了限制效应对GaN中电子输运的影响。在中等电场范围内，与文献中的实验数据取得了极好的一致性。与实验结果一致，在速度-电场曲线中未观察到负微分电导。详细讨论了其原因。通过体声子谱研究了非平衡受限电子-LO声子系统的动力学。与体电子情形相比，热或非平衡声子在决定输运性质方面不起显著作用。这通过极性光学声子散射的能量和动量守恒规则得以解释。此外，对于所考虑的电场，碰撞电离被证明是不重要的。
英文摘要：
The effects of confinement on electron transport in GaN have been studied via an ensemble Monte-Carlo code. Excellent agreement is obtained with experimental data from the literature up to moderate fields. In agreement with experimental results, negative-differential-conductivity is not observed in velocity-field curves. The reasons for this are discussed in detail. The dynamics of the non-equilibrium confined electron-LO phonon system is studied via a bulk phonon spectrum. In contrast to the bulk electron case hot or non-equilibrium phonons do not play a significant role in determining the transport properties. This is explained via the energy and momentum conservation rules for the polar optical phonon scattering. In addition, impact ionization is shown to be insignificant for the applied fields considered.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
