应用非线性斯卡尔马尼-弗里什形式主义到当前密度函数理论中的应用
Yannick J Franzke1,2, Ansgar Pausch3, Christof Holzer4
1Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany.
The Journal of chemical physics
|February 25, 2025
概括
我们扩展了一个非对线计算方法,以准确计算粒子和自旋电流密度,改进了相对论和磁场计算. 这种新方法为电子结构计算提供了更高的稳定性和准确性.
科学领域:
- 计算化学的计算化学
- 量子化学 是一个量子化学.
- 电子结构理论 电子结构理论
背景情况:
- 非对线形式主义对于精确的电子结构计算至关重要,特别是在相对论制度和有限磁场中.
- 现有的方法可能无法完全捕获旋转电流密度或确保标尺不变性.
- 超泛化的梯度近似和局部混合函数被广泛使用,但需要强大的非对线扩展.
研究的目的:
- 将Scalmani-Frisch非线性形式主义概括为包括粒子和自旋电流密度.
- 为了结合旋转轨道合和有限磁场的影响.
- 提高相对论电子结构计算的准确性和稳定性.
主要方法:
- 斯卡尔马尼-弗里什非线性形式主义的概括.
- 包括粒子和自旋电流密度用于元概括梯度近似和局部混合函数.
- 伦敦原子轨道的应用在有限磁场中测量原点不变性.
主要成果:
- 一般化形式主义成功地将所有三种自旋电流密度都包含在封闭外极限中.
- 这种方法避免了投射到旋转磁化向量上,恢复了旋转不变性.
- 该方法在相对论计算中表现出优于正统非线性方法的优势.
- 实现了数值稳定性和局部磁力扭矩不消失的潜力.
结论:
- 一般化的非线性形式主义提供了更完整和更准确的电子结构描述,特别是在自旋轨道合系统和磁场中.
- 这一进步为研究磁性材料和现象提供了改进的计算工具.
- 该方法确保了测量器不变性和旋转不变性,这对于可靠的理论预测至关重要.
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