Electron sharing and localization in real space for the Mott transition from 1RDMFT periodic calculations

Electron sharing and localization in real space for the Mott transition from 1RDMFT periodic calculations
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1RDMFT 周期计算中莫特跃迁的真实空间电子共享和定位

DOI:
10.1007/s00214-017-2125-8
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发表时间:
2017
影响因子:
1.7
通讯作者:
A. Martin Pendas
A. Martin Pendas
中科院分区:
化学4区
文献类型:
--
作者:
A. I. Baranov;A. Martin Pendas

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用单粒子约化密度矩阵泛函理论(1RDMFT)研究了原型氢晶格中Mott相变的实空间图像。用QTAIM原子的电子共享指数评价了跃迁过程中电子局域化程度的演化,分析了跃迁不同阶段用1RDMFT关联能表示的电子关联强度与电子局域化程度之间的关系。计算了电子共享指数在跃迁过程中的空间衰变,并与Hubbard模型和有限团簇计算的结果进行了比较。
One-particle reduced density matrix functional theory (1RDMFT) has been applied for the investigation of the real-space picture of the Mott transitions in archetypal hydrogen lattices. The evolution of the degree of electron localization during the transition has been evaluated using electron sharing indices for QTAIM atoms, and the connection between the strength of electronic correlation expressed by the 1RDMFT correlation energy and the degree of electron localization has been analyzed at various stages of transition. The spatial decay of the electron sharing indices in the course of transition has also been evaluated and compared with the results obtained for the Hubbard model and finite cluster calculations.
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