Ti-Al-2022-06-22¶

The current structure dataset comprises 54145 structures generated from elemental ICSD structures and binary ICSD prototype alloy structures. A more detailed procedure is found in Phys. Rev. B 102, 174104 (2020).

Predictions using Pareto optimal MLPs

../../_images/prediction-ecoh-volume107.png

The cohesive energy and volume are obtained by performing a local structure optimization from the DFT equilibrium structure. In addition, the DFT equilibrium structure is obtained by optimizing a prototype structure included in ICSD, and the prototype is used as the structure legend in the figure. Therefore, the structure type of the converged structure is sometimes different from that shown in the legend even if the potential energy surface predicted by MLP is almost the same as the true one.

The other properties predicted by each Pareto optimal MLP are available from column Predictions in the following table.

Ti-Al-2022-06-22 shows large prediction errors. They should be carefully used. Such an MLP is often accurate for reasonable structures, but it is not accurate for unrealistic structures.

Pareto optimals¶
Name	Time [ms] (1core/36cores)	RMSE [meV/atom]/[eV/A]	Predictions	Files
pair-21	0.036 / 0.005	43.109 / 0.2967	–	–
pair-37	0.039 / 0.005	19.725 / 0.1919	–	–
pair-49	0.041 / 0.005	11.009 / 0.1594	–	–
pair-44	0.256 / 0.026	10.571 / 0.1650	–	–
gtinv-722	0.266 / 0.023	8.0136 / 0.1199	predictions	`mlp.lammps` `input` `log`
pair-60	0.335 / 0.025	5.1117 / 0.1329	predictions	`mlp.lammps` `input` `log`
gtinv-182	0.525 / 0.035	2.5536 / 0.0786	predictions	`mlp.lammps` `input` `log`
gtinv-411	0.864 / 0.056	2.2697 / 0.0734	predictions	`mlp.lammps` `input` `log`
gtinv-269	1.464 / 0.086	2.1554 / 0.0763	predictions	`mlp.lammps` `input` `log`
gtinv-272	1.986 / 0.120	1.8111 / 0.0737	predictions	`mlp.lammps` `input` `log`
gtinv-436	2.447 / 0.145	1.7895 / 0.0699	predictions	`mlp.lammps` `input` `log`
gtinv-441	3.028 / 0.181	1.6701 / 0.0694	predictions	`mlp.lammps` `input` `log`

Column “Time” shows the time required to compute the energy and forces for 1 MD step and 1 atom, which is estimated from a simulation of 10 runs for a structure with 284 atoms using a workstation with Intel(R) Xeon(R) CPU E5-2695 v4 @ 2.10GHz. Note that the MLPs should be carefully used for extreme structures. The MLPs often return meaningless values for them.

All Pareto optimal MLPs are available here.