Renormalization from density-functional theory to strong-coupling models for electronic states in Cu-O materials

1990 ◽  
Vol 41 (16) ◽  
pp. 11068-11072 ◽  
Author(s):  
Mark S. Hybertsen ◽  
E. B. Stechel ◽  
M. Schluter ◽  
D. R. Jennison
Keyword(s):  
Density Functional Theory ◽  
Strong Coupling ◽  
Density Functional ◽  
Electronic States ◽  
Functional Theory

Exchange-Correlation Energy Densities and Response Potentials: Connection Between Two Definitions and Analytical Model for the Strong-Coupling Limit of a Stretched Bond

2019 ◽  
Author(s):  
S. Giarrusso ◽  
Paola Gori-Giorgi
Keyword(s):  
Density Functional Theory ◽  
Strong Coupling ◽  
Density Functional ◽  
Correlation Energy ◽  
Order Term ◽  
Strong Coupling Limit ◽  
Local Form ◽  
Coupling Constant ◽  
Functional Theory ◽  
Exchange Correlation

We analyze in depth two widely used definitions (from the theory of conditional probablity amplitudes and from the adiabatic connection formalism) of the exchange-correlation energy density and of the response potential of Kohn-Sham density functional theory. We introduce a local form of the coupling-constant-dependent Hohenberg-Kohn functional, showing that the difference between the two definitions is due to a corresponding local first-order term in the coupling constant, which disappears globally (when integrated over all space), but not locally. We also design an analytic representation for the response potential in the strong-coupling limit of density functional theory for a model single stretched bond.<br>

Research Optical Characteristics of H2S Molecule Adsorption on Agn (n=2,4,6) Clusters

2013 ◽  
Vol 321-324 ◽  
pp. 499-502
Author(s):  
Hong Zhou ◽  
Jun Feng Wang ◽  
Jun Qing Wen ◽  
Wei Bin Cheng ◽  
Jun Fei Wang
Keyword(s):  
Density Functional Theory ◽  
Infrared Spectrum ◽  
Density Functional ◽  
Global Minimum ◽  
Electronic States ◽  
Binding Energies ◽  
Optical Characteristics ◽  
Functional Theory ◽  
Calculation Results ◽  
Planar Geometries

Density-functional theory has been used to calculate the energetically global-minimum geometries and electronic states of AgnH2S (n=2, 4, 6) clusters. The lowest-energy structures of Ag2, Ag4, Ag6, Ag2H2S, Ag4H2S and Ag6H2S clusters were obtained, respectively. The calculation results show that the lowest-energy structures of Ag2, Ag4and Ag6clusters are planar geometries. The binding energies of Agn(n=2, 4, 6) clusters are gradually increasing in our calculations. Compare the infrared spectrum peaks of Ag4cluster with that of Ag6cluster, which show that the peaks shift to shortwave. After adsorption, we found that the peaks shift to shortwave by comparison.

scholarly journals Density functional theory study on the atomic structure and electronic states of Cu(100) (2×22)R45°-O surface

2005 ◽  
Vol 54 (11) ◽  
pp. 5350
Author(s):  
Cai Jian-Qiu ◽  
Tao Xiang-Ming ◽  
Chen Wen-Bin ◽  
Zhao Xin-Xin ◽  
Tan Ming-Qiu
Keyword(s):  
Density Functional Theory ◽  
Atomic Structure ◽  
Density Functional ◽  
Electronic States ◽  
Density Functional Theory Study ◽  
Functional Theory

Width-dependent structural stability and magnetic properties of monolayer zigzag MoS2 nanoribbons

2017 ◽  
Vol 31 (03) ◽  
pp. 1750017 ◽  
Author(s):  
Yan-Ni Wen ◽  
Peng-Fei Gao ◽  
Xi Chen ◽  
Ming-Gang Xia ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Magnetic Properties ◽  
Structural Stability ◽  
Magnetic Moment ◽  
First Principles ◽  
Density Functional ◽  
Electronic States ◽  
Two Dimensional ◽  
Functional Theory ◽  
Proportional Relationship

First-principles study based on density functional theory has been employed to investigate width-dependent structural stability and magnetic properties of monolayer zigzag MoS2 nanoribbons (ZZ-MoS2 NRs). The width N = 4–6 (the numbers of zigzag Mo–S chains along the ribbon length) are considered. The results show that all studied ZZ-MoS2 NRs are less stable than two-dimensional MoS2 monolayer, exhibiting that a broader width ribbon behaves better structural stability and an inversely proportional relationship between the structural stability (or the ribbon with) and boundary S–Mo interaction. Electronic states imply that all ZZ-MoS2 NRs exhibit magnetic properties, regardless of their widths. Total magnetic moment increases with the increasing width N, which is mainly ascribed to the decreasing S–Mo interaction of the two zigzag edges. In order to confirm this reason, a uniaxial tension strain is applied to ZZ-MoS2 NRs. It has been found that, with the increasing tension strain, the bond length of boundary S–Mo increases, at the same time, the magnetic moment increases also. Our results suggest the rational applications of ZZ-MoS2 NRs in nanoelectronics and spintronics.

Density Functional Study of H2S Adsorption on Small Agn (n = 1–5)

2013 ◽  
Vol 634-638 ◽  
pp. 47-51 ◽  
Author(s):  
Jun Qing Wen ◽  
A Ping Yang ◽  
Guo Xiang Chen ◽  
Chen Jun Zhang
Keyword(s):  
Density Functional Theory ◽  
Binding Energy ◽  
Density Functional ◽  
Global Minimum ◽  
Electronic States ◽  
Functional Study ◽  
Functional Theory ◽  
Energy Gaps ◽  
Single Fold ◽  
Homo And Lumo

The global-minimum geometries and electronic states of AgnH2S (n=1-5) clusters have been calculated using density-functional theory. Our calculations predicate that the stable geometries of AgnH2S clusters can be got by directly adding the H2S molecule on different site of Agn clusters, Agn (n=1-5) clusters would like to bond with sulfur atom and the H2S molecule is partial to hold the top location and single fold coordination site in the clusters. After adsorption, the structures of Agn clusters and H2S molecule keep the original structures and are only distorted slightly. The averaged binding energy reveals that adsorption of H2S molecule can strengthen the stabilities of AgnH2S clusters. The second difference in energy and the energy gaps between the HOMO and LUMO of Agn and AgnH2S have been studied.

scholarly journals Structural isomers and low-lying electronic states of gas-phase M+(N2O)n (M = Co, Rh, Ir) ion–molecule complexes

2019 ◽  
Vol 21 (26) ◽  
pp. 13959-13967 ◽  
Author(s):  
Ethan M. Cunningham ◽  
Alexander S. Gentleman ◽  
Peter W. Beardsmore ◽  
Stuart R. Mackenzie
Keyword(s):  
Density Functional Theory ◽  
Nitrous Oxide ◽  
Gas Phase ◽  
Density Functional ◽  
Electronic States ◽  
Structural Isomers ◽  
Functional Theory ◽  
Phase Group ◽  
Ion Molecule Complexes ◽  
Metal Ligand

The structures of gas-phase group nine cation–nitrous oxide metal–ligand complexes, M+(N2O)n (M = Co, Rh, Ir; n = 2–7) have been determined by a combination of infrared photodissociation spectroscopy and density functional theory.

Effects of atomic Ag on AgBr photocatalyst surfaces: a theoretical survey

RSC Advances ◽  
2014 ◽  
Vol 4 (62) ◽  
pp. 33134-33143 ◽  
Author(s):  
Yuhua Chi ◽  
Lianming Zhao ◽  
Xiaoqing Lu ◽  
Wenyue Guo ◽  
Yunqi Liu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Density Functional ◽  
Electronic States ◽  
Functional Theory

The electronic states and optical properties of atomic Ag on AgBr photocatalyst surfaces have been investigated using density functional theory plus Hubbard U contributions.

Momentum-dependent band spin splitting in semiconducting MnO2: a density functional calculation

2016 ◽  
Vol 18 (19) ◽  
pp. 13294-13303 ◽  
Author(s):  
Yusuke Noda ◽  
Kaoru Ohno ◽  
Shinichiro Nakamura
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Manganese Oxides ◽  
Electronic States ◽  
Spin Splitting ◽  
Density Functional Calculation ◽  
Functional Theory ◽  
Spin Polarized ◽  
Crystal Phases ◽  
The Relationship

The electronic states of pristine manganese dioxides in different crystal phases have been explored using spin-polarized density functional theory with Hubbard U correction to provide a basis to understand the relationship between the spin-dependent electronic states and the crystallography of manganese oxides.

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