arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.4926cond-mat.mtrl-sciphysics.optics
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N型δ掺杂硅能带结构的平衡态温度特性研究

A Study of Temperature-dependent Properties of N-type delta-doped Si Band-structures in Equilibrium

Hoon Ryu, Sunhee Lee, Gerhard Klimeck

摘要:

采用半经验的SPDS紧束缚带模型和周期性边界条件的量子阱模型模拟了高磷δ掺杂Si器件。研究了其随温度变化的电子性质。考虑到高掺杂密度与许多电子,一个高度并行化的自洽薛定谔-泊松求解器使用多个杂质离子的原子表示。平衡态的能带结构和相应的费米能级位置计算一组选择的温度。在室温下的结果与以前的研究进行了比较,温度依赖的电子性质进行了进一步的详细讨论与计算的三维自洽势分布。

英文摘要:

A highly phosphrous delta-doped Si device is modeled with a quantum well with periodic boundary conditions and the semi-empirical spds* tight-binding band model. Its temperature-dependent electronic properties are studied. To account for high doping density with many electrons, a highly parallelized self-consistent Schroedinger-Poisson solver is used with atomistic representations of multiple impurity ions. The band-structure in equilibrium and the corresponding Fermi-level position are computed for a selective set of temperatures. The result at room temperature is compared with previous studies and the temperature-dependent electronic properties are discussed further in detail with the calculated 3-D self-consistent potential profile.

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