Reference : Accurate and Efficient Method for Many-Body van der Waals Interactions
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/25125
Accurate and Efficient Method for Many-Body van der Waals Interactions
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Tkatchenko, Alexandre mailto [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
DiStasio, Jr [Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA]
Car, Roberto [Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA]
Scheffler, Matthias [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany]
2012
PHYSICAL REVIEW LETTERS
AMER PHYSICAL SOC
108
23
Yes (verified by ORBilu)
International
0031-9007
ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
[en] An efficient method is developed for the microscopic description of the frequency-dependent polarizability of finite-gap molecules and solids. This is achieved by combining the Tkatchenko-Scheffler van der Waals (vdW) method [Phys. Rev. Lett. 102, 073005 (2009)] with the self-consistent screening equation of classical electrodynamics. This leads to a seamless description of polarization and depolarization for the polarizability tensor of molecules and solids. The screened long-range many-body vdW energy is obtained from the solution of the Schrodinger equation for a system of coupled oscillators. We show that the screening and the many-body vdW energy play a significant role even for rather small molecules, becoming crucial for an accurate treatment of conformational energies for biomolecules and binding of molecular crystals. The computational cost of the developed theory is negligible compared to the underlying electronic structure calculation.
http://hdl.handle.net/10993/25125
10.1103/PhysRevLett.108.236402
Article

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