bootstrap_signed_mstar — 794 Quantum ESPRESSO DFT calculations on
perturbed semiconductor crystal structures, with signed effective
mass values (681 negative, 113 positive). Signed-m* DFT data is rare:
JARVIS, Materials Project, and AFLOW all store magnitudes only, which
destroys the sign that distinguishes band-inverted from normal-curvature
bands. This subset is the… See the full description on the dataset page:
https://huggingface.co/datasets/bshepp/rl-surrogate-dft-gap.