Many‐body contribution to the van der Waals binding energy of nonpolar fluids

1990 ◽  
Vol 92 (10) ◽  
pp. 6112-6115 ◽  
Author(s):  
B. Cichocki ◽  
B. U. Felderhof
Keyword(s):  
Binding Energy ◽  
Van Der Waals ◽  
Many Body ◽  
Nonpolar Fluids

Condensation signatures of a degenerate many-body state of interlayer excitons in a van der Waals MoSe2–WSe2 heterostack

2021 ◽  
Author(s):  
Lukas Sigl ◽  
Florian Sigger ◽  
Mirco Troue ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Many Body ◽  
Body State

scholarly journals Capturing excitonic and polaronic effects in lead iodide perovskites from many-body perturbation theory

2021 ◽  
Author(s):  
Pooja Basera ◽  
Arunima Singh ◽  
Deepika Gill ◽  
Saswata Bhattacharya
Keyword(s):  
Optical Properties ◽  
Perturbation Theory ◽  
Binding Energy ◽  
Electronic Properties ◽  
Effective Mass ◽  
Exciton Binding Energy ◽  
Many Body ◽  
Energy Materials ◽  
Lead Iodide ◽  
Many Body Perturbation Theory

Lead iodide perovskites have attracted considerable interest as promising energy-materials. However, till date, several key electronic properties such as optical properties, effective mass, exciton binding energy and the radiative exciton...

scholarly journals Including dispersion in density functional theory for adsorption on flat oxide surfaces, in metal–organic frameworks and in acidic zeolites

2020 ◽  
Vol 22 (14) ◽  
pp. 7577-7585 ◽  
Author(s):  
Florian R. Rehak ◽  
GiovanniMaria Piccini ◽  
Maristella Alessio ◽  
Joachim Sauer
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Van Der Waals ◽  
Metal Organic Frameworks ◽  
Many Body ◽  
Functional Theory ◽  
Metal Organic ◽  
The Many ◽  
Acidic Zeolites ◽  
Better Than

Contrary to common believe, for eight adsorption cases, neither D3 or TS are an improvement compared to D2 nor van der Waals functionals or dDsC. Only the many body approaches are slightly better than D2(Ne) which uses Ne parameters for Mg2+ ions.

scholarly journals Convergence of the many-body expansion of interaction potentials: From van der Waals to covalent and metallic systems

2007 ◽  
Vol 76 (1) ◽  
Author(s):  
Andreas Hermann ◽  
Robert P. Krawczyk ◽  
Matthias Lein ◽  
Peter Schwerdtfeger ◽  
I. P. Hamilton ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Many Body ◽  
Interaction Potentials ◽  
The Many ◽  
Metallic Systems

Photoemission Study of K Doping on a Monolayer of C60 on Clean Si(001)-(2 × 1) Surface

1998 ◽  
Vol 05 (01) ◽  
pp. 101-104 ◽  
Author(s):  
Tun-Wen Pi ◽  
Le-Hong Hong ◽  
Rong-Tzong Wu ◽  
Chiu-Ping Cheng ◽  
May-Ho Ko
Keyword(s):  
Binding Energy ◽  
Work Function ◽  
Valence Band ◽  
Weak Interaction ◽  
Silicon Surface ◽  
Many Body ◽  
Body Effect ◽  
Charge Polarization ◽  
The Many ◽  
Photoemission Study

We present the first valence band photoemission study of a monolayer K x C 60 on a clean Si(001)-(2 × 1) surface. The monolayer C60 which shows weak interaction with the silicon surface reveals clear, but broadened, structures corresponding to bulk C 60. Upon K exposure, the work function drops rapidly due to charge polarization toward the Si surface, considerably affecting then the rate of the Lumo filling. Its centroid initially shown at 0.6 eV shifts to higher binding energy with higher concentration. Moreover, the LUMO always separates 1.5 ± 0.1 eV from the Homo. Features associated with the many-body effect do not appear in the spectra. The Fermi cutoff has never been observed, indicating the insulating nature of the K x C 60 surface.

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