使用布洛克内在原子轨道的万尼尔函数定位
1Physical & Theoretical Chemistry Laboratory, University of Oxford, Oxford OX1 3QZ, U.K.
The journal of physical chemistry. A
|September 19, 2024
概括
我们开发了一种新方法,使用内在原子轨道 (IAO) 精确地定位晶体中的电子特性. 这种方法提高了对固态系统中化学结合的理解.
科学领域:
- 固态物理和量子化学.
- 计算材料科学.计算材料科学.
- 电子结构理论. 电子结构理论.
背景情况:
- 精确地定位电子波函数对于理解化学键和材料特性至关重要.
- 对于Wannier函数局部化的现有方法可能是计算密集的,并且可能与某些电子频段进行斗争.
研究的目的:
- 将分子轨道定位的内在原子轨道 (IAO) 方法扩展到晶体中概括的万尼尔函数的计算.
- 为布洛赫函数的初始相位对齐引入一个计算效率高,一次性糖尿病瓦尼化程序.
- 在各种固态系统上验证开发的Wannier本地化技术.
主要方法:
- 对分子轨道定位的内在原子轨道 (IAO) 方法的扩展到晶体系统.
- 实施一次性糖尿病瓦尼化程序,以快速调整布洛赫函数的相位.
- 在各种固态材料上测试Wannier定位,包括表面吸附系统.
主要成果:
- 使用扩展的IAO方法在晶体中成功计算了局部化的通用Wannier函数.
- 证明糖尿病制剂的有效性,以便立即定位Wannier,特别是在核心频段.
- 来自Bloch IAOs的Wannier函数部分电荷显示出与化学直觉的强烈一致,例如在MgO上的CO吸附.
结论:
- 扩展的IAO方法为固体中的Wannier函数定位提供了一个强大的方法.
- 糖尿病制剂显著提高了Wannier定位的效率和准确性,特别是在具有挑战性的电子结构中.
- 这项工作为研究材料中的化学键和电子性质提供了有价值的工具,具有高保真度.
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