arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.00710cond-mat.mtrl-sci
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肖特基势垒物理的第一性原理

First-Principles Theory for Schottky Barrier Physics

Dmitry Skachkov, Shuang-Long Liu, Yan Wang, Xiao-Guang Zhang, Hai-Ping Cheng

摘要:

我们发展了肖特基势垒物理的第一性原理理论。泊松方程的解决完全自洽的静电电荷密度和正常的密度泛函理论(DFT)的电子结构迭代循环之外,允许计算肖特基势垒完全从DFT涉及在半导体中的数千个原子层。体中的感应电荷包括来自掺杂和能带弯曲的导带和价带电荷,以及来自半导体带隙中的倏逝态的电荷。肖特基势垒高度是在感应电荷密度和感应静电势达到自洽时确定的。

英文摘要:

We develop a first-principles theory for Schottky barrier physics. The Poisson equation is solved completely self-consistently with the electrostatic charge density and outside the normal density functional theory (DFT) electronic structure iteration loop, allowing computation of a Schottky barrier entirely from DFT involving thousands of atomic layers in the semiconductor. The induced charge in the bulk consists of conduction and valence band charges from doping and band bending, as well as charge from the evanescent states in the gap of the semiconductor. The Schottky barrier height is determined when the induced charge density and the induced electrostatic potential reach self-consistency.

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