Global Materials Structure Search with Chemically Motivated Coordinates

Chiara Panosetti, Konstantin Krautgasser, Dennis Palagin, Karsten Reuter, Reinhard J. Maurer*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

Identification of relevant reaction pathways in ever more complex composite materials and nanostructures poses a central challenge to computational materials discovery. Efficient global structure search, tailored to identify chemically relevant intermediates, could provide the necessary first-principles atomistic insight to enable a rational process design. In this work we modify a common feature of global geometry optimization schemes by employing automatically generated collective curvilinear coordinates. The similarity of these coordinates to molecular vibrations enhances the generation of chemically meaningful trial structures for covalently bound systems. In the application to hydrogenated Si clusters, we concomitantly observe a significantly increased efficiency in identifying low-energy structures and exploit it for an extensive sampling of potential products of silicon-cluster soft landing on Si(001) surfaces.

Original languageEnglish
Pages (from-to)8044-8048
Number of pages5
JournalNano Letters
Volume15
Issue number12
DOIs
Publication statusPublished - 9 Dec 2015
Externally publishedYes

Keywords

  • adsorbate structure search
  • Basin hopping
  • curvilinear coordinates
  • delocalized internals
  • global optimization

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