CASTEP 22.11 DFT calculations using the RSCAN exchange-correlation functional with on-the-fly ultrasoft pseudopotentials; 900 eV cutoff; SCF energy tolerance 1e-8 eV; Monkhorst-Pack k-point grids with density at least 5.305 k-points per angstrom^-1 and offset 1/(2N) angstrom^-1; convergence tested against a 1500 eV, 12x12x12 reference.CASTEP
Settings
validation{"quantities":["lattice constant a0","C11","C12","C44","band gap"],"references":["Nichols","Vasil'ev","Hickernell","Cunnel","Vurgaftman"],"techniques":["bulk elasticity","band gap"],"sourcetype":"literatureexperimentaldata"}
kpoint schemeMonkhorst-Pack
cutoff energy ev900
pseudopotentialson-the-fly ultrasoft pseudopotentials
exchange correlationRSCAN
scf energy tolerance ev0
kpoint density per angstrom5.305
Conditions
target system:zincblende InP
convergence reference:1500 eV cutoff, 12x12x12 grid
Training ACE and MACE machine-learned interatomic potentials on the InP DFT dataset. ACE used a 6 angstrom cutoff, correlation order 3, total degree 18, 15,006 basis functions, Bayesian regression (BLR) with p=4 smoothness prior and energy/force/stress weights of 20 eV^-1, 1 (eV/angstrom)^-1, 5 (eV/angstrom^2)^-1. MACE used a 90:10 train/validation split by configuration type, 64x0e + 64x1o features, batch size 16, 150 epochs, SWA from epoch 80, and initial energy/force/stress weights of 10 eV^-1, 1000 (eV/angstrom)^-1, 1000 (eV/angstrom^2)^-1, later averaged with 1000 eV^-1, 10 (eV/angstrom)^-1, 1000 (eV/angstrom^2)^-1 for SWA portion.ACEfit.jl; ACEpotentials; MACE