Pressure dependence of dynamically screened Coulomb interactions in NiO:   Effective Hubbard, Hund, intershell, and intersite components

doi:10.1103/PhysRevB.96.045137

CORC > 北京大学 > 化学与分子工程学院

	Pressure dependence of dynamically screened Coulomb interactions in NiO: Effective Hubbard, Hund, intershell, and intersite components
	Panda, S. K. ; Jiang, H. ; Biermann, S.
刊名	PHYSICAL REVIEW B
	2017
关键词	TRANSITION-METAL MONOXIDES X-RAY PHOTOEMISSION ELECTRONIC-STRUCTURE VALENCE-BAND MOTT INSULATORS STATE NICKEL SPECTRA SPECTROSCOPY ABSORPTION
DOI	10.1103/PhysRevB.96.045137
英文摘要	In this work, we report the pressure dependence of the effective Coulomb interaction parameters (Hubbard U) in paramagnetic NiO within the constrained random phase approximation (cRPA). We consider five different low-energy models starting from the most expensive one that treats both Ni-d and O-p states as correlated orbitals (dp-dp model) to the smallest possible two-orbital model comprising the e(g) states only (e(g)-e(g) model). We find that in all the considered models, the bare interactions are not very sensitive to the compression. However, the partially screened interaction parameters show an almost linear increment as a function of compression, resulting from the substantial weakening of screening effects upon compression. This counterintuitive trend is explained from the specific characteristic changes of the basic electronic structure of this system. We further calculate the nearest-neighbor intersite d-d interaction terms, which also show substantial enhancement due to compression. The computed interaction parameters for antiferromagnetic NiO are almost identical to their paramagnetic counterparts. Results for other prototypical 3d transition metal monoxides, FeO, CoO, and CuO, further demonstrate that the monotonic increase of the partially screened interaction parameters under the application of pressure is a generic characteristic of transition metal monoxides. Finally, the effective parameters of 3d states grow as a function of the atomic number of the transition metal ion.; European Research Council [CORRELMAT 617196]; IDRIS/GENCI Orsay [t2016091393]; National Natural Science Foundation of China [21373017, 21621061]; SCI(E); ARTICLE; 4; 96
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472013]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Panda, S. K.,Jiang, H.,Biermann, S.. Pressure dependence of dynamically screened Coulomb interactions in NiO: Effective Hubbard, Hund, intershell, and intersite components[J]. PHYSICAL REVIEW B,2017.
APA	Panda, S. K.,Jiang, H.,&Biermann, S..(2017).Pressure dependence of dynamically screened Coulomb interactions in NiO: Effective Hubbard, Hund, intershell, and intersite components.PHYSICAL REVIEW B.
MLA	Panda, S. K.,et al."Pressure dependence of dynamically screened Coulomb interactions in NiO: Effective Hubbard, Hund, intershell, and intersite components".PHYSICAL REVIEW B (2017).