{'fraction_non_alphanumeric': 0.02263083451202263, 'fraction_numerical': 0.004243281471004243, 'mean_word_length': 5.4363636363636365, '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}}
Optical vibrational states of diamond nanocrsytals

The phonon band structure and Raman response of diamond nanowires are calculated by means of the Born potential, including central and non-central interatomic forces, and a supercell model. The Raman scattering is studied by means of the local bond-polarization model based on the displacement-displacement Green's function within the linear response theory. Free standing, infinitely long and homogeneous quantum wires cross sections with the wire axis along the [001] direction are considered. The results show an important shift of the main Raman peak (highest optical mode) towards lower energies, in comparison with the bulk crystalline diamond case.