金属化$β$ - SiC(001)表面的能带弯曲和准二维电子气
Band bending and quasi-2DEG in the metallized $β$-SiC(001) surface
摘要:
研究了氢吸附诱导$β$ -SiC(001)富硅表面金属化的机理。我们分析了能带弯曲的影响,并证明了准二维电子气的存在,这源于从吸附氢到体导电态的电子捐赠。我们还提供了一个简单的模型,捕捉的主要特点的第一性原理计算的结果,并揭示了该过程的基本物理。
英文摘要:
We study the mechanism leading to the metallization of the $β$-SiC(001) Si-rich surface induced by hydrogen adsorption. We analyze the effects of band bending and demonstrate the existence of a quasi-2D electron gas, which originates from the donation of electrons from adsorbed hydrogen to bulk conduction states. We also provide a simple model that captures the main features of the results of first-principles calculations, and uncovers the basic physics of the process.
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