Dresden 2017 – wissenschaftliches Programm
MM 55.4: Vortrag
Donnerstag, 23. März 2017, 11:00–11:15, BAR 205
Predicting lattice parameters of ternary compounds by compressed sensing — •Benedikt Hoock1,2, Santiago Rigamonti1, Luca Ghiringhelli2, Matthias Scheffler1,2, and Claudia Draxl1,2 — 1Humboldt-Universität zu Berlin — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin
Data analytics is emerging as a new branch of materials science enabling the interpolation and even (moderate) extrapolation of high-level computational results. In our present work, we demonstrate the successful prediction of lattice parameters for a set of 438 group-IV zincblende ternary compounds from density-functional theory (DFT) results. We use a compressed-sensing based method that combines the least absolute shrinkage and selection operator (LASSO) and ℓ0 -regularized optimization on a feature space consisting of basic features and a large range of simple mathematical combinations of them. The basic features comprise atomic and dimer DFT data as well as properties of relaxed tetrahedral clusters. We achieve a root mean square error of ∼ 0.04 Å( ∼ 0.4 %) for the fit and a similar prediction accuracy, as estimated by a leave-10%-out cross-validation.