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SAMPLE: Surface structure search enabled by coarse graining and statistical learning

delete2019-11-01
delete27
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OA
AI
L
Lukas Hörmann
A
Andreas Jeindl
A
Alexander T. Egger
M
Michael Scherbela
O
Oliver T. Hofmann *
DOI:10.1016/j.cpc.2019.06.010delete
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Abstract

Abstract

En 中文
In this publication we introduce SAMPLE, a structure search approach for commensurate organic monolayers on inorganic substrates. Such monolayers often show rich polymorphism with diverse molecular arrangements in differently shaped unit cells. Determining the different commensurate polymorphs from first principles poses a major challenge due to the large number of possible molecular arrangements. To meet this challenge, SAMPLE employs coarse-grained modeling in combination with Bayesian linear regression to efficiently map the minima of the potential energy surface. In addition, it uses ab initio thermodynamics to generate phase diagrams. Using the example of naphthalene on Cu(111), we comprehensively explain the SAMPLE approach and demonstrate its capabilities by comparing the predicted with the experimentally observed polymorphs. (C) 2019 Elsevier B.V. All rights reserved.
Keywords:
Hybrid organic/inorganic interface
Bayesian linear regression
Polymorphism
Surface induced phase
First principles simulation
Naphthalene on Cu(111)
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Journal

Computer Physics Communications cover
Computer Physics Communications
IF:
3.4
Papers:
1.2W
Citations:
3.7W

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Graz University of Technology
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