Papers › First-Principles Theory for Schottky Barrier Physics
First-Principles Theory for Schottky Barrier Physics
Dmitry Skachkov, Shuang-Long Liu, Yan Wang, Xiao-Guang Zhang, Hai-Ping Cheng
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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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