Universiteit Leiden

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FRESH Lecture

  • Dr. Alexandre Tkatchenko (Fritz Haber Institute Berlin)
Thursday 21 January 2016
FRESH Lectures
Gorlaeus Building
Einsteinweg 55
2333 CC Leiden
Havinga Lecture Hall

Non-Covalent van der Waals Interactions: A Solved Problem?

Non-covalent van der Waals (vdW) interactions are ubiquitous in molecules and materials. Our conceptual understanding of these interactions is largely based on perturbative models, which are often unable to capture the full extent of non-local quantum-mechanical fluctuations which can extend up to tens of nanometers in real systems. The origin of such many-body fluctuations will be discussed and their importance demonstrated for a hierarchy of systems, ranging from simple gas-phase dimers, supramolecular host-guest complexes, extended molecular crystals, to layered 2D heterostructures. The development of efficient many-body methods that explicitly address the non-local collective nature of quantum fluctuations not only leads to significant improvements in the accuracy of calculations [1,2,3], but also allows us to discover novel conceptual insights that give us the ability to control these fluctuations in the design of intricate materials. These facts will be highlighted by presenting a few selected examples from our recent work [3-9].

  1. A. Tkatchenko and M. Scheffler, Phys. Rev. Lett. 102, 073005 (2009).
  2. A. Tkatchenko, R. A. DiStasio Jr., R. Car, and M. Scheffler, Phys. Rev. Lett. 108, 236402 (2012).
  3. R. A. DiStasio Jr., et al., Proc. Natl. Acad. Sci. USA 109, 14791 (2012).
  4. V. V. Gobre and A. Tkatchenko, Nature Comm. 4, 2341 (2013).
  5. A. M. Reilly and A. Tkatchenko, J. Phys. Chem. Lett. 4, 1028 (2013).
  6. N. Marom et al., Angew. Chem. Int. Ed. 52, 6629 (2013).
  7. L. Kronik and A. Tkatchenko, Acc. Chem. Res. 47, 3208 (2014).
  8. W. Gao and A. Tkatchenko, Phys. Rev. Lett. 114, 096101 (2015).
  9. N. Ferri et al., Phys. Rev. Lett. 114, 176802 (2015).

Bio of Dr. Alexandre Tkatchenko

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