{'fraction_non_alphanumeric': 0.039473684210526314, 'fraction_numerical': 0.002631578947368421, 'mean_word_length': 5.560344827586207, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Core polarization in semiconductors: Effects on quasiparticle energies.

We study core-valence interactions in several technologically important semiconductors. We compute band structures treating many-body effects in Hedin's {ital GW} approximation. The core-valence correlation and core polarization are treated using a core-polarization potential formulation instead of standard, less reliable, mean-field approaches. This is critical for materials with shallow cores (Ge, GaAs), where mean-field treatments of core-valence interactions bias certain band gaps by up to 0.4 eV. The core-polarization potential formulation may be used in either frozen-core all-electron or pseudopotential calculations, since it deals only with core-valence many-body effects.