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arXiv 0910.4665cond-mat.mes-hall
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石墨烯中的电流饱和和表面极化声子散射

Current Saturation and Surface Polar Phonon Scattering in Graphene

Vasili Perebeinos, Phaedon Avouris

摘要:

我们提出了一个研究的极性绝缘衬底上的石墨烯器件的传输使用紧束缚模型。使用多波段玻尔兹曼处理的流动性计算。我们提供了表面极性声子对低场迁移率的贡献随载流子密度、温度和距衬底的距离的缩放。在高偏压下,我们发现石墨烯的自热效应对于解释所观察到的饱和电流行为是必不可少的。我们预测,通过优化器件的冷却,高偏置电流可以显着增强。

英文摘要:

We present a study of transport in graphene devices on polar insulating substrates using a tight-binding model. The mobility is computed using a multiband Boltzmann treatment. We provide the scaling of the surface polar phonon contribution to the low-field mobility with carrier density, temperature, and distance from the substrate. At high bias, we find that graphene self-heating effect is essential to account for the observed saturated current behavior. We predict that by optimizing the device cooling, the high bias currents can be significantly enhanced.

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。

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