Layer response theory: Energetics of layered materials from semianalytic high-level theory
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We present a readily computable semianalytic layer response theory (LRT) for analysis of cohesive energetics involving two-dimensional layers such as BN or graphene. The theory approximates the random phase approximation (RPA) correlation energy. Its RPA character ensures that the energy has the correct van der Waals asymptotics for well-separated layers, in contrast to simple pairwise atom-atom theories, which fail qualitatively for layers with zero electronic energy gap. At the same time, our theory is much less computationally intensive than the full RPA energy. It also gives accurate correlation energies near the binding minimum, in contrast to Lifshitz-type theory. We apply our LRT successfully to graphite and to BN, and to a graphene-BN heterostructure.
Physical Review B - Condensed Matter and Materials Physics
© 2016 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Condensed Matter Physics not elsewhere classified