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van der Waals Bonding in Layered Compounds from Advanced Density-Functional First-Principles Calculations

T. Björkman, A. Gulans, A. V. Krasheninnikov, and R. M. Nieminen
Phys. Rev. Lett. 108, 235502 – Published 7 June 2012
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Abstract

Although the precise microscopic knowledge of van der Waals interactions is crucial for understanding bonding in weakly bonded layered compounds, very little quantitative information on the strength of interlayer interaction in these materials is available, either from experiments or simulations. Here, using many-body perturbation and advanced density-functional theory techniques, we calculate the interlayer binding and exfoliation energies for a large number of layered compounds and show that, independent of the electronic structure of the material, the energies for most systems are around 20meV/Å2. This universality explains the successful exfoliation of a wide class of layered materials to produce two-dimensional systems, and furthers our understanding the properties of layered compounds in general.

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  • Received 3 January 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.235502

© 2012 American Physical Society

Authors & Affiliations

T. Björkman1, A. Gulans1, A. V. Krasheninnikov1,2, and R. M. Nieminen1

  • 1COMP - Aalto University School of Science, P.O. Box 11100, 00076 Aalto, Finland
  • 2Department of Physics, University of Helsinki, P.O. Box 43 00014 Helsinki, Finland

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Issue

Vol. 108, Iss. 23 — 8 June 2012

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